Facts for Ages 8–10
3437 facts perfect for this age group
Walruses use their long ivory tusks to haul themselves out of the water and onto ice floes, which is why their scientific name Odobenus means 'tooth-walker.' The tusks also signal social status and are used in fights for territory.
In 1990, Voyager 1 took the famous 'Pale Blue Dot' photograph of Earth from 6 billion kilometres away. Our entire planet appears as a tiny speck of light.
A single bolt of lightning is five times hotter than the surface of the Sun.
Sound travels about 4 times faster in water than in air.
Dolphins sleep with one eye open so half their brain stays awake.
Astronauts can grow up to 2 inches taller in space because there is no gravity compressing their spine.
Ancient Egyptians used moldy bread to help heal wounds — an early form of antibiotics!
Antarctica is technically a desert because it gets very little precipitation.
Lake Baikal in Russia is home to the Baikal seal, the only species of seal that lives entirely in freshwater. Scientists are still debating how it got there.
Giant squid have eyes the size of dinner plates — up to 10 inches across!
Lake Superior contains enough water to cover all of North and South America in one foot of water.
Roller skates were invented by Belgian Joseph Merlin in 1760, who famously introduced them at a masquerade party in London while playing the violin. He could not stop himself, crashed into a large mirror, and broke it — as well as his violin and himself.
During filming of Jurassic Park, the full-sized T. rex animatronic sometimes shook on its own when water from the rain scene soaked into its foam skin, terrifying the crew.
The ancient Maya and Aztec civilisations used cacao beans as currency. They were considered so valuable that people would use them to buy food and goods.
Popcorn became the go-to cinema snack during the Great Depression because it was one of the few treats most people could still afford.
Dragonflies are the most successful hunters in the animal kingdom, catching about 95% of everything they chase — far better than lions or sharks.
Medieval castles were deliberately built with small windows and thick stone walls — not just for defence, but to stay cool in summer. However, they were bitterly cold and damp in winter.
Canned food was invented in 1810, but the can opener wasn't invented until 1855 — people used hammers and chisels before that.
The last samurai and the American Wild West cowboys existed at the same time in history.
Carrots were originally purple before the orange variety was developed in the 1600s.