Science Facts

Here are 50 interesting science facts:

1. The human brain has about 100 billion neurons.

2. Light travels at around 300,000 kilometers per second.

3. The Earth's core is primarily composed of iron and nickel.

4. DNA, the blueprint of life, is found in the nucleus of cells.

5. The speed of sound is faster in water than in air.

6. The universe is approximately 13.8 billion years old.

7. Atoms are mostly empty space.

8. The largest organ in the human body is the skin.

9. A lightning bolt is hotter than the surface of the sun.

10. The shortest bone in the human body is in the ear.

11. Dolphins sleep with one eye open.

12. Honey never spoils.

13. The Milky Way galaxy is estimated to contain over 100 billion stars.

14. The fastest land animal is the cheetah.

15. A teaspoonful of neutron star material weighs about as much as Mount Everest.

16. Water expands when it freezes, which is why ice floats.

17. A day on Venus is longer than a year on Venus.

18. There are more atoms in a single glass of water than there are glasses of water in all the oceans on Earth.

19. The human body contains enough carbon to make graphite for about 9000 pencils.

20. Octopuses have three hearts.

21. The Earth's atmosphere is composed mainly of nitrogen and oxygen.

22. Sound cannot travel through a vacuum.

23. The study of fossils is called paleontology.

24. The smell of freshly-cut grass is actually a plant distress call.

25. The coldest temperature ever recorded on Earth was -128.6°F (-89.2°C) in Antarctica.

26. Bees communicate with each other by dancing.

27. The Great Wall of China is not visible from space with the naked eye.

28. The average human body carries about 0.2 milligrams of gold.

29. Jupiter's gravity slingshots asteroids and comets away from Earth.

30. There are more stars in the universe than grains of sand on all the beaches on Earth.

31. The planet Uranus rotates on its side.

32. Every element heavier than helium was created in the heart of a star.

33. The human eye can distinguish about 10 million different colors.

34. The Eiffel Tower can be 15 cm taller during the summer due to thermal expansion.

35. The first computer virus was created in 1983.

36. The fear of the number 13 is called triskaidekaphobia.

37. The largest volcano in the solar system is on Mars: Olympus Mons.

38. A cubic inch of bone can support over 19,000 pounds.

39. The world's oldest known creature is a mollusk called Ming the clam, estimated to be around 507 years old.

40. A day on Mercury is longer than its year.

41. There are more bacteria in your mouth than there are people in the world.

42. Saturn's density is so low that it could float in water.

43. Light from the Sun takes about 8 minutes and 20 seconds to reach Earth.

44. The first computer programmer was a woman named Ada Lovelace.

45. The Earth's atmosphere extends beyond the Moon.

46. There are more possible iterations of a game of chess than there are atoms in the known universe.

47. The word "scientist" first appeared in 1834.

48. Honeybees can recognize human faces.

49. Only 5% of the universe is composed of ordinary matter, the rest is dark matter and dark energy.

50. Every cell in your body is replaced every seven to ten years.