For the cornfield scene in Interstellar, Christopher Nolan grew 500 acres of corn, which he knew was feasible from his work in Man of Steel. The corn was later sold, and they actually made a profit.

Croatia is known for its stunning beaches and crystal-clear waters, but it's not just the scenery that makes it a popular tourist destination. Croatia is also one of the few countries in the world that has dog lifeguards. A special school trains a number of different breeds for this activity but Golden retrievers, Labradors and Newfoundland's are the most common breeds. These breeds are seen as friendly by 'victims' and are usually superb swimmers. Their fur is more water resistant and the Newfoundland even boasts webbed paws. The calm temperaments of these furry helpers are an important quality. It is easy for people or dogs to panic in tricky situations so being able to remain calm is valuable. 

In the 1920s, a farmer accidentally stumbled across a stash of jade artifacts in Sichuan, China. This site, called Sanxingdui, had a major breakthrough in 1986 when workers discovered thousands of artifacts of great artistry. A large bronze figure, giant masks and a bronze tree about four meters tall are some of the artifacts unearthed here.

In 1915, Charles Hatfield promised to make it rain over the city of San Diego using his secret chemical formula. The city council even agreed to pay him $10,000 if he could fill the Morena Reservoir and end their drought. The result, some days later, was one of the worst floods in the city’s history.

This bright electric blue stick insect is called Achrioptera fallax, and they are found in Madagascar. They do not attack or bite people, and feed mainly on leaves of raspberry, bramble, oak and eucalyptus.

This upside-down fig tree has grown in the ancient ruins of Baia in the city of Bacoli, Italy. The tree sprouted from the ceiling of the arch, and no one is sure how the tree ended up there or how it managed to survive. It grows every year and even bears fruit!

The Prague Astronomical Clock, a medieval astronomical clock that is attached to the Old Town Hall in Prague, was first installed in 1410. It is the world's third-oldest astronomical clock as well as the oldest clock in the world that is still in operation.

Astronauts on the Apollo 11, 12 and 14 missions had to quarantine for 21 days from the time of their first encounter with lunar material, in case they had brought along harmful organisms to Earth.

This is Whang-od Oggay, a 105-year-old tattoo artist from the Philippines. She is often described as the last and oldest Kalinga tattoo artist, and has been performing the traditional art of hand-tapped tattoos since the age of 15.

The baby cage was invented in 1913 by Mrs. Robert C. Lafferty. It stuck out of a window like an air conditioner and the baby was placed in it to enjoy fresh air and sunshine. The idea was to allow Mom to tend to other duties while baby was out of harm's way.

This is gongylus gongylodes, a species of praying mantis found across Asia. It has extremely slender limbs and large appendages, and the insect sways its body and back and forth to look like a stick flowing in the wind. Because of this, it is called the wandering violin mantis.

Airport runways are not numbered sequentially. They are numbered based on compass bearings in which the runway is oriented. This way, if you are on runway 9, you would be heading east 90 degrees on a compass, and if you are on runway 27, you would be heading west 270 degrees.

This odd-looking creature is a bird called the great eared nightjar. It has barred wings along with a barred tail and long ear-tufts that often lie flat. It is the largest species in the family and can grow up to 12 to 16 inches.

This is the Falkirk Wheel, the only rotating boat lift of its kind in the world. A combination of engineering and art allows the wheel to raise boats by more than 114 feet before they sail through the sky. Situated in central Scotland, it connects the Union Canal with the Forth and Clyde Canal.

Sony's PlayStation was never meant to be an actual product. Instead, it was intended to be a CD-ROM console that would support Nintendo games. However, when Nintendo backed out of the deal at the last minute, Sony went ahead and launched what soon became one of the most successful gaming consoles of all time.

In 2018, footwear retailer Payless set up a fake luxury shoe store called Palessi. Their aim was to see if people would be willing to pay luxury prices for their discount footwear. It succeeded, with shoppers agreeing to pay upto about $600 for footwear that would typically cost between $19.99 and $39.99.

Chainsaws were originally invented in the 18th century to aid in childbirth.

There is a pill that makes you poop gold and it is sold for $425. They are completely edible and are ideal for people who want to bling out their feces.