Did you know?

28 August 2026

1. 01

   A narwhal's long spiral "horn" is actually an oversized tooth that grows out through its upper lip, not a horn at all.

2. 02

   Horseshoe crab blood is blue because it uses copper-based hemocyanin instead of iron-based hemoglobin to carry oxygen.

3. 03

   Flamingo chicks are born grey, and only turn pink because of pigments from the shrimp and algae they eat.

4. 04

   One species of jellyfish, Turritopsis dohrnii, can turn its adult cells back into an early life stage, essentially resetting its own aging.

5. 05

   Cats cannot taste sweetness at all because they lack the taste receptor gene that detects sugars.

6. 06

   Elephants are the only mammals that cannot jump, because their legs and body structure are built for constant ground contact.

7. 07

   The platypus is one of the very few mammals that lays eggs, and males also carry a venomous spur on their hind legs.

8. 08

   A camel's hump stores fatty tissue for energy, not water, which is why the hump shrinks when the animal goes long without food.

9. 09

   Chameleons change colour mainly to communicate mood and attract mates, not primarily to camouflage themselves.

10. 10

    The Great Barrier Reef is the largest living structure on Earth, built entirely by tiny coral organisms over thousands of years.

11. 11

    Most of Earth's volcanic activity happens not on land but underwater, along volcanic mountain ranges on the ocean floor.

12. 12

    Earth's inner core is roughly as hot as the surface of the Sun, even though it is solid due to immense pressure.

13. 13

    More than half of the oxygen in Earth's atmosphere is produced by ocean phytoplankton, not by rainforests.

14. 14

    A white dwarf is the small, extremely dense core left behind after a star like the Sun runs out of fuel and sheds its outer layers.

15. 15

    Space is completely silent because sound waves need a medium like air or water to travel, and space is a near-total vacuum.

16. 16

    Mercury, the smallest planet in our solar system, has no moons at all and almost no atmosphere to trap heat.

17. 17

    Jupiter spins so fast that its day lasts less than 10 hours, the shortest day of any planet in our solar system.

18. 18

    Glass is technically an amorphous solid, not a slow-flowing liquid — old windows look uneven simply because of how they were made long ago.

19. 19

    The sky looks blue because sunlight scatters off molecules in the air, and blue light, having a shorter wavelength, scatters far more than red light.

20. 20

    Ice floats on water because water is one of the few substances that expands, rather than contracts, when it freezes solid.

21. 21

    GPS satellites carry atomic clocks that run slightly faster than clocks on Earth due to Einstein's relativity, so engineers correct them daily to keep positioning accurate.

22. 22

    The idea that different parts of the tongue taste only sweet, salty, sour or bitter is a myth — every region of the tongue can sense all basic tastes.

23. 23

    The electrical activity of a human brain, even at rest, generates enough power to run a small LED light.

24. 24

    If you could flatten out all the air sacs inside human lungs, they would cover an area roughly the size of a tennis court.

25. 25

    A newborn baby has about 300 bones, but many fuse together while growing up, leaving adults with only 206.

26. 26

    Contrary to popular belief, the Great Wall of China cannot be seen from space with the naked eye — it is too narrow compared to the distance.

27. 27

    The word "bug" for a computer glitch comes from 1947, when engineers found an actual moth stuck inside an early computer's relay switch.

28. 28

    Aluminium was once considered more precious than gold, because 19th-century methods to extract it from ore were extremely difficult and costly.