Written by Jess Macdonald
Now that it’s summer and you don’t have anything to do, why not learn some interesting facts to amuse your friends… or save this list for the next exam period when you’re desperately trying to procrastinate? Either way, here are 30 amazing facts about the world that you (probably) never knew!
1. Seahorses don't have stomachs, just intestines to absorb nutrients from food. They eat plankton and small crustaceans most of the time to compensate for the rapid passing of food through their digestive system.
2. Healthy nails grow about 2 cm each year. Fingernails grow four times as fast as toenails.
3. Someone who weighs 150 pounds (68 kg) on Earth will be only 25 pounds (11 kg) on the moon – the moon is just 1 % the Earth’s mass, which is why its gravity is so much lower.
4. Tigers have striped skin, not just striped fur.
5. The ocean is 12,080.7 feet (3,682.2 meters) deep on average. That's about eight Empire State Buildings, stacked one on top of the other. The deepest part of the ocean, however, is about 36,200 feet down (11,030 m) – called the Mariana Trench in the Western Pacific Ocean. That's more like 25 Empire State Buildings.
6. There are 60,000 miles (97,000 km) of blood vessels in every human.
7. Cats vs. dogs, the age old debate: Cats have over one hundred vocal sounds, while dogs only have about ten.
8. Our eyes are always the same size from birth, but our nose and ears never stop growing.
9. A cockroach can live for several weeks without its head.
10. The male platypus has a venomous spur on its hind foot capable of dispensing a poison that can kill a medium-sized dog.
11. The longest recorded flight of a chicken is thirteen seconds
12. There are more living organisms on the skin of a single human being than there are human beings on the surface of the earth.
13. The average person has 100,000 hairs on his/her head. Each hair grows about 5 inches (12.7 cm) every year.
14. Scallops have as many as 100 simple eyes. They're frequently blue.
15. Every year in the US, 625 people are struck by lightning.
16. Toilet paper is a relatively new invention, but Roman philosopher Seneca used a sponge attached to a stick to wipe with which he called a ‘tersorium.’
17. An Astronaut can be up to 2 inches taller returning from space. The cartilage disks in the spine expand in the absence of gravity.
18. Humans have a brain area called the fusiform gyrus that specializes in recognizing faces.
19. Lobsters have blue blood.
20. Pregnant women have about 50% more blood than they did before they conceived by week 20 of pregnancy in order to support their growing foetus.
21. According to the social media website, Twitter users sent 200 million Tweets per day in 2011. Apparently that’s the text equivalent of 8,163 copies of ‘War and Peace.’
22. A giraffe's neck contains the same number of vertebrae as a human.
23. The embryos of tiger sharks fight each other while in their mother's womb, the survivor being the baby shark that is born!
24. The average human produces a quart of saliva a day -- about 10,000 gallons in a lifetime.
25. King Richard the Lionheart's heart was removed and preserved after he died in 1199 — though today it's a pile of dust.
26. The Central American salamander Bolitoglossa dofleini can extend its tongue more than half its body length in 7 milliseconds, 50 times faster than the blink of an eye.
27. Camels can down 30 gallons (113 liters) of water in just 13 minutes.
28. There is a plant more deadly than the Venus flytrap - bladderworts are carnivorous, bog-dwelling plants which can snap their traps shut in less than a millisecond, 100 times faster than the more commonly known Venus!
29. Crocodiles swallow stones to help them dive deeper.
30. Harvard has a book bound by human skin…