Did you know?

12 September 2026

1. 01

   A day on Mercury, from sunrise to sunrise, lasts about 176 Earth days, longer than Mercury's own year of 88 Earth days.

2. 02

   Neptune takes about 165 Earth years to complete one full orbit around the Sun.

3. 03

   Saturn's rings are made mostly of water ice, in pieces ranging from tiny grains to chunks the size of a house.

4. 04

   A full NASA spacesuit costs more than 12 million dollars to build.

5. 05

   Footprints left on the Moon by Apollo astronauts could last for millions of years, since there is no wind or water there to erode them.

6. 06

   Glass is classified as an amorphous solid: its atoms are arranged loosely like a liquid's, but it behaves rigidly like a solid.

7. 07

   Diamond conducts heat about five times better than copper, even though it does not conduct electricity.

8. 08

   Liquid helium cooled near absolute zero becomes a superfluid and can flow with no friction at all.

9. 09

   A single bolt of lightning carries enough energy to toast about 100,000 slices of bread.

10. 10

    Sound cannot travel through a vacuum because it needs particles, such as air or water, to move through.

11. 11

    Antarctica is technically classified as a desert because it receives very little precipitation each year, despite being covered in ice.

12. 12

    Lightning strikes somewhere on Earth roughly 8 million times a day.

13. 13

    The Pacific Ocean is slowly shrinking by a few centimeters a year as the Atlantic Ocean widens.

14. 14

    Earth's core is almost as hot as the surface of the Sun, reaching temperatures of around 5,400 degrees Celsius.

15. 15

    The Mariana Trench, the deepest point in the ocean, is deeper than Mount Everest is tall.

16. 16

    The first computer 'bug' was literally a real moth found stuck inside a relay switch in 1947.

17. 17

    The QWERTY keyboard layout was designed in the 1870s, partly to reduce jamming in mechanical typewriters.

18. 18

    The first computer mouse, built in 1964, had a wooden shell.

19. 19

    The first text message was sent in 1992 and simply said 'Merry Christmas.'

20. 20

    Sea otters hold hands while sleeping so they do not drift apart in the water.

21. 21

    Flamingos are born grey; their feathers turn pink because of pigments in the shrimp and algae they eat.

22. 22

    Some jellyfish species can reverse their own aging process, making them biologically capable of living indefinitely.

23. 23

    Octopuses have taste receptors on their arms, letting them taste whatever they touch.

24. 24

    Koalas have fingerprints so similar to human fingerprints that they have reportedly confused crime-scene investigators.

25. 25

    Babies are born with about 300 bones, but adults have only 206 because many of them fuse together while growing.

26. 26

    The human heart beats about 100,000 times a day, pumping roughly 7,500 liters of blood.

27. 27

    The human nose can distinguish more than one trillion different scents.

28. 28

    Human skin fully replaces itself roughly every 27 days.

29. 29

    The masseter, the jaw muscle used for chewing, is the strongest muscle in the human body relative to its size.