What are the earliest human-made hybrid-animals?
Cuneiform tablets and seals of Mesopotamia dating back to the late third millennium B.C. document intentional breeding of highly valued equids called “kungas” for use in diplomacy, ceremony, and warfare.
Their precise zoological classification, however, has never been conclusively determined.
But in the early 2000s from a royal burial complex dating back to 2600 B.C. at Umm el-Marra in northern Syria scientists excavated dozens of equine skeletons.
The animals, whose physical features didn’t match any known equine species, appear to be these “kungas”.
After sequencing the genomes of one of these ~4500-year-old equids, the researchers concluded that they were hybrids between female domestic donkeys and male hemippes (Syrian wild ass).
This discovery makes “kungas” the oldest evidence of humans creating hybrid animals.
But as this mystery was solved after the last hemippe perished, it’s impossible to make "kungas" again.
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Cuneiform tablets and seals of Mesopotamia dating back to the late third millennium B.C. document intentional breeding of highly valued equids called “kungas” for use in diplomacy, ceremony, and warfare.
Their precise zoological classification, however, has never been conclusively determined.
But in the early 2000s from a royal burial complex dating back to 2600 B.C. at Umm el-Marra in northern Syria scientists excavated dozens of equine skeletons.
The animals, whose physical features didn’t match any known equine species, appear to be these “kungas”.
After sequencing the genomes of one of these ~4500-year-old equids, the researchers concluded that they were hybrids between female domestic donkeys and male hemippes (Syrian wild ass).
This discovery makes “kungas” the oldest evidence of humans creating hybrid animals.
But as this mystery was solved after the last hemippe perished, it’s impossible to make "kungas" again.
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What were the most drinking nations in 2021?
Evaluating how much alcohol was consumed by different nations in 2021, experts asked respondents from different countries 3 questions.
In terms of frequency of drinking, French people appeared to be the leaders, consuming alcohol on average 132 days a year. New Zealand, whose citizens drink 120 times yearly, is in the second place, and the Netherlands came third with 112 times, followed by Hungary (109) and the UK (107).
The next question was about “feeling drunk”. Here, Australians took the lead, getting drunk almost 27 times a year. Denmark and Finland share the second place with 23,8 times annually. A bit less often in 2021 got hammered the inhabitants of the US and the UK.
In the category of “feeling regret” the survey revealed new leaders. People from Ireland (28,4 times) and Poland (28,3) felt the most regret after drinking alcohol. 25-28 annual regrets were recorded in New Zealand, Romania, Spain, Italy, Canada and Hungary.
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Evaluating how much alcohol was consumed by different nations in 2021, experts asked respondents from different countries 3 questions.
In terms of frequency of drinking, French people appeared to be the leaders, consuming alcohol on average 132 days a year. New Zealand, whose citizens drink 120 times yearly, is in the second place, and the Netherlands came third with 112 times, followed by Hungary (109) and the UK (107).
The next question was about “feeling drunk”. Here, Australians took the lead, getting drunk almost 27 times a year. Denmark and Finland share the second place with 23,8 times annually. A bit less often in 2021 got hammered the inhabitants of the US and the UK.
In the category of “feeling regret” the survey revealed new leaders. People from Ireland (28,4 times) and Poland (28,3) felt the most regret after drinking alcohol. 25-28 annual regrets were recorded in New Zealand, Romania, Spain, Italy, Canada and Hungary.
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Can dogs understand that humans are speaking different languages?
To answer this question scientists scanned the brain of dogs while they were listening to audio records first in a language of their master and then in a “foreign” language.
It was found that one of the brain regions — the secondary auditory cortex — showed different neurological responses to the language that dogs were used to, and to the one, that they hadn’t heard before.
Moreover, the older the dog in the experiment was, the better they were able to distinguish between the two languages.
The research also revealed that dogs react differently to normal speech and to non-speech, that is human speech sounds that made no sense.
Scientists are now trying to establish whether this ability is dogs’ specialty, or it is a common occurrence among non-human species.
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To answer this question scientists scanned the brain of dogs while they were listening to audio records first in a language of their master and then in a “foreign” language.
It was found that one of the brain regions — the secondary auditory cortex — showed different neurological responses to the language that dogs were used to, and to the one, that they hadn’t heard before.
Moreover, the older the dog in the experiment was, the better they were able to distinguish between the two languages.
The research also revealed that dogs react differently to normal speech and to non-speech, that is human speech sounds that made no sense.
Scientists are now trying to establish whether this ability is dogs’ specialty, or it is a common occurrence among non-human species.
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Does the size of an image matter for remembering it?
In their recent study scientists say yes.
Across experiments where participants viewed images freely without the task of memorising them, larger images were remembered about 1.5 times better than smaller ones, and the effect was proportional to the image size.
It can be explained by the fact that bigger images require more visual system processing resources. That leads to stronger registration into memory than that of smaller images processed by fewer brain resources.
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In their recent study scientists say yes.
Across experiments where participants viewed images freely without the task of memorising them, larger images were remembered about 1.5 times better than smaller ones, and the effect was proportional to the image size.
It can be explained by the fact that bigger images require more visual system processing resources. That leads to stronger registration into memory than that of smaller images processed by fewer brain resources.
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Does every star have planets?
The answer of astronomers is “no”, but they add that it is a question of whether a planet was detected near a star of not.
Since 1992 when astronomers discovered the first planet outside the solar system, telescopes have spotted thousands of so-called exoplanets orbiting different stars.
Scientists now know that some stars — like the sun, as well as red dwarf stars many light-years away — are home to more than half a dozen planets, while others have none.
But what makes one star host so many planets while others fly solo?
Scientists think it may depend on the way the star was formed.
A ring of dust particles that usually surrounds young stars when they are shaping can eventually form planets.
But that model is not always the case.
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The answer of astronomers is “no”, but they add that it is a question of whether a planet was detected near a star of not.
Since 1992 when astronomers discovered the first planet outside the solar system, telescopes have spotted thousands of so-called exoplanets orbiting different stars.
Scientists now know that some stars — like the sun, as well as red dwarf stars many light-years away — are home to more than half a dozen planets, while others have none.
But what makes one star host so many planets while others fly solo?
Scientists think it may depend on the way the star was formed.
A ring of dust particles that usually surrounds young stars when they are shaping can eventually form planets.
But that model is not always the case.
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What is normal blood sugar?
Normal blood sugar levels vary from person to person, but a normal range for fasting blood sugar (the amount of glucose in your blood at least eight hours after a meal) is between 70 and 100 milligrams per deciliter (mg/DL), according to the World Health Organization.
Recent studies showed that most people averaged around 82 mg/DL during the night and around 93 mg/DL during the day, and spiked to a maximum of 132 mg/DL an hour after a meal.
Blood sugar, or glucose, is a form of sugar that serves as the body's main source of energy.
We obtain glucose from the food we eat, predominantly carbohydrate-rich foods such as potatoes, rice and bread.
The absorption and storage of glucose is regulated constantly by complex processes that take place in our digestive systems.
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Normal blood sugar levels vary from person to person, but a normal range for fasting blood sugar (the amount of glucose in your blood at least eight hours after a meal) is between 70 and 100 milligrams per deciliter (mg/DL), according to the World Health Organization.
Recent studies showed that most people averaged around 82 mg/DL during the night and around 93 mg/DL during the day, and spiked to a maximum of 132 mg/DL an hour after a meal.
Blood sugar, or glucose, is a form of sugar that serves as the body's main source of energy.
We obtain glucose from the food we eat, predominantly carbohydrate-rich foods such as potatoes, rice and bread.
The absorption and storage of glucose is regulated constantly by complex processes that take place in our digestive systems.
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What are volatile organic compounds (VOCs)?
Volatile organic compounds or VOCs are chemicals that are lighter than air at room temperature and are responsible for the characteristic smells of things like paint thinner and perfumes.
VOCs come from lots of human-made materials such as paints, petroleum fuels and pharmaceuticals, as well as natural sources.
If produced mostly by plants, animals, and microorganisms, they are called biogenic volatile organic compounds (BVOCs) and play an important role in the chemical processes that occur in the atmosphere.
About 10% of VOCs in the environment are human-made, and many of them, for instance benzene or perchloroethylene, can cause health problems, especially if a person is exposed to high levels for a long period of time.
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Volatile organic compounds or VOCs are chemicals that are lighter than air at room temperature and are responsible for the characteristic smells of things like paint thinner and perfumes.
VOCs come from lots of human-made materials such as paints, petroleum fuels and pharmaceuticals, as well as natural sources.
If produced mostly by plants, animals, and microorganisms, they are called biogenic volatile organic compounds (BVOCs) and play an important role in the chemical processes that occur in the atmosphere.
About 10% of VOCs in the environment are human-made, and many of them, for instance benzene or perchloroethylene, can cause health problems, especially if a person is exposed to high levels for a long period of time.
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Who invented Bluetooth and how does it work?
Bluetooth is a method of short-range wireless communication between electronic devices that harnesses the power of radio waves.
But if the radio spectrum stretches from 30 Hz to 300 GHz (the lower the frequency, the longer the range), Bluetooth operates at 2.4 GHz which gives it the right balance between range and data quality.
It was conceived by a Dutch engineer Dr Jaap Haartsen at the Swedish mobile giant Ericsson in the 1990s.
In 1998 the Bluetooth Special Interest Group (SIG) was formed to develop and promote the technology.
The group released Bluetooth 1.0 in 1999 and a year later it began to be used in mobile phones and desktop PCs, making its way into laptops and printers in 2001.
In the mid-2000s, the Bluetooth headset – which allowed people to communicate hands free – became a common sight.
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Bluetooth is a method of short-range wireless communication between electronic devices that harnesses the power of radio waves.
But if the radio spectrum stretches from 30 Hz to 300 GHz (the lower the frequency, the longer the range), Bluetooth operates at 2.4 GHz which gives it the right balance between range and data quality.
It was conceived by a Dutch engineer Dr Jaap Haartsen at the Swedish mobile giant Ericsson in the 1990s.
In 1998 the Bluetooth Special Interest Group (SIG) was formed to develop and promote the technology.
The group released Bluetooth 1.0 in 1999 and a year later it began to be used in mobile phones and desktop PCs, making its way into laptops and printers in 2001.
In the mid-2000s, the Bluetooth headset – which allowed people to communicate hands free – became a common sight.
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How much horsepower can one horse produce?
Based on the term, one may assume that a horse can produce around 1 horsepower.
Linguistically, it makes sense. In reality, it's way off the mark.
The maximum output of a horse is actually much closer to 15 horsepower.
In fact, a more befitting name for the unit might be "humanpower," as the average healthy person can produce just over 1 horsepower.
Where did the term come from?
It was coined in the late 1700s by James Watt, a Scottish engineer remembered for his steam engines.
To highlight the superiority of his contraptions he decided to compare steam engines to horses and invented a unit of measurement.
Based on his observations Watt estimated that working horses were capable of pushing about 33,000 pounds 1 foot per minute (14,968.55 kilograms 1 meter per minute).
That’s how the "horsepower" unit was born.
Watt’s machines were more powerful than horses, and very few people questioned the veracity of his calculations.
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Based on the term, one may assume that a horse can produce around 1 horsepower.
Linguistically, it makes sense. In reality, it's way off the mark.
The maximum output of a horse is actually much closer to 15 horsepower.
In fact, a more befitting name for the unit might be "humanpower," as the average healthy person can produce just over 1 horsepower.
Where did the term come from?
It was coined in the late 1700s by James Watt, a Scottish engineer remembered for his steam engines.
To highlight the superiority of his contraptions he decided to compare steam engines to horses and invented a unit of measurement.
Based on his observations Watt estimated that working horses were capable of pushing about 33,000 pounds 1 foot per minute (14,968.55 kilograms 1 meter per minute).
That’s how the "horsepower" unit was born.
Watt’s machines were more powerful than horses, and very few people questioned the veracity of his calculations.
Subscribe- t.me/askmenow
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What are four major concepts in science?
Scientists distinguish between facts, hypotheses, laws and theories.
Facts are simple, one-off observations that have been found to be true.
Laws are generalized observations about a relationship between two or more things in the natural world based on a variety of facts and empirical evidence, often framed as a mathematical statement. They simply describe and don’t explain phenomena.
A hypothesis is a potential explanation of a narrow phenomenon.
A scientific theory is an in-depth explanation that applies to a wide range of phenomena.
Unlike the legislation, a scientific law is much more flexible. It can have exceptions, be proven wrong or evolve over time.
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Scientists distinguish between facts, hypotheses, laws and theories.
Facts are simple, one-off observations that have been found to be true.
Laws are generalized observations about a relationship between two or more things in the natural world based on a variety of facts and empirical evidence, often framed as a mathematical statement. They simply describe and don’t explain phenomena.
A hypothesis is a potential explanation of a narrow phenomenon.
A scientific theory is an in-depth explanation that applies to a wide range of phenomena.
Unlike the legislation, a scientific law is much more flexible. It can have exceptions, be proven wrong or evolve over time.
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When did humanity realize the risks of climate change?
More than 3,000 years ago, in Ancient Greece people began to debate whether draining swamps or cutting down forests might bring more or less rainfall to the region, but these documented climate change discussions had a local focus.
In 1896, building up on works of other researchers, a Swedish scientist Svante Arrhenius (1859-1927) became the first person to surmise that humanity could change the climate on a global scale.
In 1957, an American researcher Roger Revelle published a study, revealing that the ocean will not absorb all of the carbon dioxide released in humanity's industrial fuel emissions and that carbon dioxide levels in the atmosphere could rise significantly.
Since then more studies began to appear highlighting climate change as a potential threat to species and ecosystems around the world. However, it’s only at the end of the 1980s when the humanity started to take real measures facing the global challenge.
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More than 3,000 years ago, in Ancient Greece people began to debate whether draining swamps or cutting down forests might bring more or less rainfall to the region, but these documented climate change discussions had a local focus.
In 1896, building up on works of other researchers, a Swedish scientist Svante Arrhenius (1859-1927) became the first person to surmise that humanity could change the climate on a global scale.
In 1957, an American researcher Roger Revelle published a study, revealing that the ocean will not absorb all of the carbon dioxide released in humanity's industrial fuel emissions and that carbon dioxide levels in the atmosphere could rise significantly.
Since then more studies began to appear highlighting climate change as a potential threat to species and ecosystems around the world. However, it’s only at the end of the 1980s when the humanity started to take real measures facing the global challenge.
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What countries have the most islands?
Three Scandinavian states are the world‘a leaders in terms of islands being part of their national territory.
Sweden is home to 221,800 mostly uninhabited islands. This number includes islands as small as 270 square feet (25 square meters), which is about the size of a one-car garage.
Finland, the runner-up, has an estimated 188,000 islands, while Norway, which rounds out the top three, is a long way behind, with around 55,000.
In general, this fact is explained by geological history and climate of these Nordic countries.
At the same time, specialists point out that these island statistics can be a subject for debate depending on the definition of an island.
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Three Scandinavian states are the world‘a leaders in terms of islands being part of their national territory.
Sweden is home to 221,800 mostly uninhabited islands. This number includes islands as small as 270 square feet (25 square meters), which is about the size of a one-car garage.
Finland, the runner-up, has an estimated 188,000 islands, while Norway, which rounds out the top three, is a long way behind, with around 55,000.
In general, this fact is explained by geological history and climate of these Nordic countries.
At the same time, specialists point out that these island statistics can be a subject for debate depending on the definition of an island.
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What are Trojan asteroids and how many of them are sharing orbit with the Earth?
Trojan asteroids are small bodies orbiting around the L4 or L5 Lagrangian points of a Sun-planet system. Due to their peculiar orbits, they provide key constraints to the Solar System evolution models.
Currently there are more than 7,000 trojans catalogued in the Solar System. Most of them share the orbit of Jupiter.
In other planetary orbits two Uranus trojans, nine Mars trojans, and 28 Neptune trojans have been found to date.
Regarding the orbit of our planet, for the moment astronomers know about two Earth trojans. The first one is 2010 TK7, discovered in 2010, and the second is 2020 XL5, detected in 2020 but whose trojan status was confirmed by scientists just recently.
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Trojan asteroids are small bodies orbiting around the L4 or L5 Lagrangian points of a Sun-planet system. Due to their peculiar orbits, they provide key constraints to the Solar System evolution models.
Currently there are more than 7,000 trojans catalogued in the Solar System. Most of them share the orbit of Jupiter.
In other planetary orbits two Uranus trojans, nine Mars trojans, and 28 Neptune trojans have been found to date.
Regarding the orbit of our planet, for the moment astronomers know about two Earth trojans. The first one is 2010 TK7, discovered in 2010, and the second is 2020 XL5, detected in 2020 but whose trojan status was confirmed by scientists just recently.
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How many tree species inhabit the Earth?
Based on the latest global ground-sourced data, scientists estimate that there are ∼73,000 tree species globally, among which ∼9,000 tree species are yet to be discovered.
Roughly 40% of undiscovered tree species are in South America.
Moreover, almost one-third of all tree species to be discovered may be rare, with very low populations and limited spatial distribution (likely in remote tropical lowlands and mountains).
These findings highlight the vulnerability of global forest biodiversity to anthropogenic changes in land use and climate, which disproportionately threaten rare species and thus, global tree richness.
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Based on the latest global ground-sourced data, scientists estimate that there are ∼73,000 tree species globally, among which ∼9,000 tree species are yet to be discovered.
Roughly 40% of undiscovered tree species are in South America.
Moreover, almost one-third of all tree species to be discovered may be rare, with very low populations and limited spatial distribution (likely in remote tropical lowlands and mountains).
These findings highlight the vulnerability of global forest biodiversity to anthropogenic changes in land use and climate, which disproportionately threaten rare species and thus, global tree richness.
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What are top 10 countries with the most trees?
There are more than three trillion trees in the world and here are top 10 countries where most of them grow.
1. Russia isn’t only the biggest country by size but it also has the largest number of trees covering approximately 8,249,300 sq. km which is almost equal to 45% of the country’s total land area.
2. Canada: 4,916,438 sq. km of trees, covering 30% of the country’s total land area.
3. Brazil: 4,776,980 sq. km of trees and 56% of the country.
4. USA: 3,100,950 sq. km of forests and 30% of the US total land area.
5. China: 2,083,210 sq. km of forest cover.
6. Australia:1,470,832 sq. km of forest land and 19% of the country.
7. Democratic Republic Of Congo: 1,172,704 sq. km of trees or 52% of its territory.
8. Argentina: 945,336 sq. km which stands for almost 32% of the country.
9. Indonesia: 884,950 sq. km of forests, 46% of the total land area.
10. India: 802,088 sq. km of trees.
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There are more than three trillion trees in the world and here are top 10 countries where most of them grow.
1. Russia isn’t only the biggest country by size but it also has the largest number of trees covering approximately 8,249,300 sq. km which is almost equal to 45% of the country’s total land area.
2. Canada: 4,916,438 sq. km of trees, covering 30% of the country’s total land area.
3. Brazil: 4,776,980 sq. km of trees and 56% of the country.
4. USA: 3,100,950 sq. km of forests and 30% of the US total land area.
5. China: 2,083,210 sq. km of forest cover.
6. Australia:1,470,832 sq. km of forest land and 19% of the country.
7. Democratic Republic Of Congo: 1,172,704 sq. km of trees or 52% of its territory.
8. Argentina: 945,336 sq. km which stands for almost 32% of the country.
9. Indonesia: 884,950 sq. km of forests, 46% of the total land area.
10. India: 802,088 sq. km of trees.
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What is the most accurate “flat map” of Earth?
Various flat maps have been drawn over the centuries, but they all have the same issue: It is impossible to portray the 3D Earth on a 2D map without compromise.
For instance, many 2D maps, which we used to see in textbooks and on classroom walls, depict Greenland as about the same size as Africa, when in fact Africa is 14 times larger, and contain other distortions, particularly regarding the Pacific Ocean, which looks vaster than it is in reality.
In 2021, astrophysicists produced what is believed to be the most accurate flat map of Earth ever.
It consists of two "pancake maps" that can be viewed side by side or back to back.
Unlike other flat maps, the new circular map doesn't downsize or supersize the area of certain oceans or landmasses.
This way of presenting the Earth is fundamentally different to nearly every other flat map, and it remains to be seen if it will be widely adopted for general use.
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Various flat maps have been drawn over the centuries, but they all have the same issue: It is impossible to portray the 3D Earth on a 2D map without compromise.
For instance, many 2D maps, which we used to see in textbooks and on classroom walls, depict Greenland as about the same size as Africa, when in fact Africa is 14 times larger, and contain other distortions, particularly regarding the Pacific Ocean, which looks vaster than it is in reality.
In 2021, astrophysicists produced what is believed to be the most accurate flat map of Earth ever.
It consists of two "pancake maps" that can be viewed side by side or back to back.
Unlike other flat maps, the new circular map doesn't downsize or supersize the area of certain oceans or landmasses.
This way of presenting the Earth is fundamentally different to nearly every other flat map, and it remains to be seen if it will be widely adopted for general use.
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Why does electricity make a humming noise?
The electricity that comes from power plants uses alternating current (AC), so named because the current changes direction, or alternates, many times per second.
The number of times per second the current alternates depends on countries’ standards. AC power usually alternates at 50-60 hertz, or 50-60 times per second.
The hum you hear is usually about twice the frequency of the AC power being used, when electricity hums at 100-120 hertz.
It usually is an electromagnetic device called a transformer, which is used to decrease the voltage of power, vibrating that creates the hum.
The reason power lines themselves might hum is due to corona discharge - discharge of energy that happens when the electrical field around the power lines is greater than what is needed to start a flow of electric current from the power line to the surrounding air. Most modern power lines are designed to avoid this problem.
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The electricity that comes from power plants uses alternating current (AC), so named because the current changes direction, or alternates, many times per second.
The number of times per second the current alternates depends on countries’ standards. AC power usually alternates at 50-60 hertz, or 50-60 times per second.
The hum you hear is usually about twice the frequency of the AC power being used, when electricity hums at 100-120 hertz.
It usually is an electromagnetic device called a transformer, which is used to decrease the voltage of power, vibrating that creates the hum.
The reason power lines themselves might hum is due to corona discharge - discharge of energy that happens when the electrical field around the power lines is greater than what is needed to start a flow of electric current from the power line to the surrounding air. Most modern power lines are designed to avoid this problem.
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When did the modern symphony orchestra appear?
The predecessor of the modern symphony orchestra appeared around 1600. The most notable early example was the ensemble playing in the Italian composer Claudio Monteverdi’s opera Orfeo.
In the late 17th century the French composer Jean-Baptiste Lully directed for the royal court an orchestra dominated by string instruments but also including woodwinds, such as oboes and bassoons, and sometimes flutes and horns.
In the 18th century in Germany, Johann Stamitz and other composers in what is known as the Mannheim school established the basic composition of the modern symphony orchestra: four sections, consisting of woodwinds (flutes, oboes, and bassoons), brass (horns and trumpets), percussion (two timpani), and strings (first and second violins, violas, cellos, and double basses).
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The predecessor of the modern symphony orchestra appeared around 1600. The most notable early example was the ensemble playing in the Italian composer Claudio Monteverdi’s opera Orfeo.
In the late 17th century the French composer Jean-Baptiste Lully directed for the royal court an orchestra dominated by string instruments but also including woodwinds, such as oboes and bassoons, and sometimes flutes and horns.
In the 18th century in Germany, Johann Stamitz and other composers in what is known as the Mannheim school established the basic composition of the modern symphony orchestra: four sections, consisting of woodwinds (flutes, oboes, and bassoons), brass (horns and trumpets), percussion (two timpani), and strings (first and second violins, violas, cellos, and double basses).
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How many species of rhinos live now on our planet?
The rhinoceroses are odd-toed ungulates belonging to the family Rhinocerotidae.
Rhinoceroses are herbivorous by nature, possess a thick protective skin, a small brain compared to the body size, and horns.
Currently, there are five extant species in this family of which two are found in Africa and three in Southern Asia.
African species are:
- White rhinoceros
- Black rhinoceros
Asian rhinos are:
- Indian or greater one-horned rhinoceros
- Javan or lesser one-horned rhinoceros
- Sumatran Rhinoceros, also called hairy rhinoceros or Asian two-horned rhinoceros
Rhinos are one of the most threatened animals of the world.
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The rhinoceroses are odd-toed ungulates belonging to the family Rhinocerotidae.
Rhinoceroses are herbivorous by nature, possess a thick protective skin, a small brain compared to the body size, and horns.
Currently, there are five extant species in this family of which two are found in Africa and three in Southern Asia.
African species are:
- White rhinoceros
- Black rhinoceros
Asian rhinos are:
- Indian or greater one-horned rhinoceros
- Javan or lesser one-horned rhinoceros
- Sumatran Rhinoceros, also called hairy rhinoceros or Asian two-horned rhinoceros
Rhinos are one of the most threatened animals of the world.
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What are the main physical differences between white and black rhinos?
Both living in Africa, the white and the black rhinoceroses have several main differences in physical appearance.
And it’s not their colour, which is normally dark grey for both species.
Body shape
White rhinos, who are long, imponent and barrel-shaped, and can weigh up to 2,300 kg, are larger than the black ones, who are shorter and more compact with a maximum weight of about 1,200 kilograms.
Mouth shape
White rhinos are grazers and have flat and broad lips whereas black rhinos feed on leaves and branches and possess a pointed lip in the shape of a hook.
Horn length
White rhinos usually have a longer front horn and a much shorter second horn. Black rhinos have shorter front horns than white rhinos, but the second horn is just slightly shorter so that the two horns are more similar in length.
Ears
White rhinos’ ears are tubular and very long, while black rhinos have smaller and rounded ears.
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Both living in Africa, the white and the black rhinoceroses have several main differences in physical appearance.
And it’s not their colour, which is normally dark grey for both species.
Body shape
White rhinos, who are long, imponent and barrel-shaped, and can weigh up to 2,300 kg, are larger than the black ones, who are shorter and more compact with a maximum weight of about 1,200 kilograms.
Mouth shape
White rhinos are grazers and have flat and broad lips whereas black rhinos feed on leaves and branches and possess a pointed lip in the shape of a hook.
Horn length
White rhinos usually have a longer front horn and a much shorter second horn. Black rhinos have shorter front horns than white rhinos, but the second horn is just slightly shorter so that the two horns are more similar in length.
Ears
White rhinos’ ears are tubular and very long, while black rhinos have smaller and rounded ears.
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Why do we call the European continent “Europe”?
The word “Europe” goes back to Ancient Greece where the Greeks had a goddess Europa.
It’s likely that the continent was named after her.
There are two main theories why the name Europa was chosen and why this particular goddess became the representative for the continent.
One theory is that Europa came from the Akkadian word erebu, meaning “to set in the west,” because Europe was (and is) to the west of that other continent, Asia.
Another more common version is that this word combines the Greek words eurys (“broad”) and ops (“face”), because the continent represented the broad face of the land on which humankind walked.
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The word “Europe” goes back to Ancient Greece where the Greeks had a goddess Europa.
It’s likely that the continent was named after her.
There are two main theories why the name Europa was chosen and why this particular goddess became the representative for the continent.
One theory is that Europa came from the Akkadian word erebu, meaning “to set in the west,” because Europe was (and is) to the west of that other continent, Asia.
Another more common version is that this word combines the Greek words eurys (“broad”) and ops (“face”), because the continent represented the broad face of the land on which humankind walked.
Subscribe- t.me/askmenow
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