Did you know?

6 September 2026

1. 01

   The mantis shrimp can strike with its claw so fast that the water around it briefly boils, a phenomenon called cavitation, creating a flash of light and heat hotter than the sun's surface for an instant.

2. 02

   Wood frogs can survive winter by freezing almost solid, with their hearts stopping completely, and then thaw out and hop away in spring.

3. 03

   Honeybees can learn to recognize individual human faces by treating them like a puzzle of familiar shapes, even though their brains are smaller than a grain of rice.

4. 04

   Coral reefs are not plants or rocks but colonies of tiny animals called polyps, related to jellyfish and sea anemones, that build hard skeletons of calcium carbonate.

5. 05

   More than half of the oxygen in Earth's atmosphere is produced by ocean phytoplankton, tiny floating algae, rather than by forests on land.

6. 06

   Jupiter has more than 90 confirmed moons, the most of any planet in the solar system, ranging from tiny captured rocks to Ganymede, which is bigger than the planet Mercury.

7. 07

   The Moon experiences moonquakes, tremors caused by the gravitational pull of Earth and the slow cooling and contracting of the Moon's interior, some of which can last over half an hour.

8. 08

   Deep inside Jupiter, pressure is so extreme that hydrogen gas is squeezed into a liquid metal, which scientists believe generates the planet's powerful magnetic field.

9. 09

   A single day on Mercury, from one sunrise to the next, lasts longer than its entire year, because the planet spins so slowly while orbiting the sun so quickly.

10. 10

    Uranus rotates almost on its side, tilted roughly 98 degrees, likely because of a massive collision billions of years ago, so its poles take turns facing the sun.

11. 11

    Light travels fast enough to circle the entire Earth about seven and a half times in a single second.

12. 12

    Unlike most substances, water expands when it freezes, which is why ice floats instead of sinking and why frozen pipes can burst.

13. 13

    Sound cannot travel through the vacuum of space because it needs molecules to vibrate through, so an explosion in space would be completely silent to a nearby observer.

14. 14

    Diamond and the graphite in a pencil are both made of pure carbon, but their atoms are arranged so differently that one is the hardest natural material on Earth and the other is soft enough to write with.

15. 15

    Lightning strikes somewhere on Earth roughly 44 times every second, adding up to nearly 8 million strikes a day.

16. 16

    Winds carry hundreds of millions of tons of dust from the Sahara Desert across the Atlantic Ocean each year, delivering phosphorus that helps fertilize the soil of the Amazon rainforest.

17. 17

    Antarctica is technically the driest continent on Earth, since its interior is a polar desert that receives less precipitation each year than the Sahara Desert.

18. 18

    Measured from its base on the ocean floor to its peak, Hawaii's Mauna Kea volcano is taller than Mount Everest, even though Everest has the higher elevation above sea level.

19. 19

    Australia's Great Barrier Reef is the only living structure on Earth large enough to be seen from space with the naked eye, stretching over 2,300 kilometers.

20. 20

    In 1947, engineers working on the Harvard Mark II computer found an actual moth trapped in a relay switch, causing a malfunction, giving rise to the term computer bug.

21. 21

    The average human heart beats about 100,000 times a day, pumping roughly 7,500 liters of blood without ever needing a rest.

22. 22

    The human nose can distinguish over a trillion different scents, far more than the few thousand once assumed, thanks to about 400 types of smell receptors working in combination.

23. 23

    The adult human skeleton completely replaces itself roughly once every ten years, as old bone tissue is broken down and new bone is built in its place.

24. 24

    Some nerve signals in the human body travel at speeds of over 100 meters per second, fast enough to cross a football field in about one second.

25. 25

    A modern smartphone has vastly more computing power than the guidance computers NASA used to land astronauts on the Moon during the Apollo missions.

26. 26

    Contrary to popular belief, the Great Wall of China is not actually visible to the naked eye from space, as confirmed by astronauts who have orbited Earth.

27. 27

    Brain tissue itself has no pain receptors, which is why neurosurgeons can operate on a fully awake patient's brain without causing them any pain there.