A healthy brain (left) compared to that in Alzheimer's disease (right).

Alzheimer's disease is a chronic neurodegenerative disease and the cause of 60-70% of dementia cases.

Notice the loss of cortex in the Alzheimer's brain on the right, seen by the deepening of sulci (the valleys between folds in the brain) and enlargement of brain ventricles.⁠

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In the late 18th century, people in Paris, France found it fashionable to wear lightning rods in hats and umbrellas.

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There is a plant called the Skeleton Flower whose petals turn transparent when wet and then revert back to white when dry.

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Pigeons are one of the most intelligent birds on the planet. Pigeons can recognize all 26 letters of the English language and are also capable of conceptualizing.

Pigeons can differentiate between photographs and even differentiate between two different human beings in a photograph.

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Vikings used ravens to navigate. They brought ravens aboard their ships, then released them and sailed in the same direction to find land. The raven was so important to them that it became the symbol on their flag. This practice of releasing ravens was continued into the 18th century.

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😳 The world's termites outweigh the world's humans by about 10 to 1. They greatly outnumber us, and for every person there are about 453 kg of termites.

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The driest place on Earth is in Antarctica.

As strange as it sounds, some parts of the McMurdo Valley in Antarctica have seen no rain for nearly two million years.

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In 1923, the Brazier family from Silverton, Oregon, lost their Scotch Collie/English Shepherd mix, Bobbie, during a trip to Indiana.

Six months later, Bobbie returned home, having traveled approximately 2,551 miles across plains, deserts, and mountains, earning him the nickname "Bobbie the Wonder Dog."

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🐌 A snail breathes through its foot.

Air does not enter and exit through the mouth but through the pneumostome (breathing hole) which is located on the side, under the shell of the snail.

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🦁 Tigers have striped skin, not just striped fur. The stripes are like fingerprints—no two tigers have the same pattern.

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The world's first computer weighed about 30 tons and consisted of 18,000 electronic tubes.

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The human brain doesn’t have pain receptors. Thus brain surgery is performed while people are awake.

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Mi Teleférico, also known as Teleférico La Paz–El Alto, is an aerial cable car 🚠 transit system serving the La Paz–El Alto metropolitan area in Bolivia. 🇧🇴
As of October 2019, the system consists of 26 stations (36 if transfer stations are counted separately per line) along ten lines: Red, Yellow, Green, Blue, Orange, White, Sky Blue, Purple, Brown, and Silver. Further lines and extensions are in planning or construction

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It is Unwise to shower during a thunderstorm because lightning can travel through your plumbing. The risk might be less with plastic pipes than with metal pipes.

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In ancient China, it was not supposed to cut hair because people believed that it contained the life force of the 'qi.' So if you are not supposed to cut your hair, you need to tidy it so that it does not irritate you. The easiest way to do it was a hairpin, which dates back to about 600 B.C.

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When you reach 100 years old in Barbados, you get a stamp in your honor.

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The lighter was officially invented before the match and, moreover, was much more convenient.

The first lighter is considered to be the Döbereiner's Lighter, which was produced by Johann Wolfgang Döbereiner in 1823.

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The Miracle berry is a unique fruit that, when consumed, temporarily alters your taste perception.

Prevents your taste buds from detecting sour flavors for approximately thirty minutes. As a result, sour foods can taste surprisingly sweet.

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😅 At birth, a baby panda is smaller than a mouse.

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Giraffes only need 5 to 30 minutes of sleep in a 24 hour period.

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