Nature · For ages 7–11
Dinosaurs for kids, explained simply
Dinosaurs were a group of reptiles that lived millions of years ago, long before humans existed. Most died out about 66 million years ago, probably after a huge asteroid struck the Earth. We know about them from fossils — the hardened remains and footprints they left behind in rock.
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The big ideas
Fossils are clues in stone
When a dinosaur died and was buried quickly, minerals slowly turned its bones into rock over millions of years. Scientists dig up these fossils and read them like clues.
Plant-eaters and meat-eaters
Some dinosaurs ate only plants (like the long-necked Brachiosaurus); others hunted (like Tyrannosaurus rex). You can often guess which by looking at their teeth.
Birds are living dinosaurs
Here’s a surprise scientists are now sure of: birds are the descendants of dinosaurs. The pigeon on your street is a distant cousin of T. rex.
A quick quiz
1. How do we know what dinosaurs were like?
Choices: From photographs · From fossils · From old diaries
Answer: From fossils. Nobody photographed a dinosaur — they’re long gone. We learn about them from fossils: bones and footprints turned to stone.
2. What probably caused most dinosaurs to die out?
Choices: A huge asteroid impact · A cold winter · They moved away
Answer: A huge asteroid impact. About 66 million years ago a giant asteroid is thought to have struck Earth, changing the climate so much that most dinosaurs couldn’t survive.
3. Which animals alive today are descendants of dinosaurs?
Choices: Lizards · Birds · Sharks
Answer: Birds. Birds! Scientists now agree birds evolved from small feathered dinosaurs — so dinosaurs never fully disappeared.
For parents: helping your child think about dinosaurs
Dinosaurs are a brilliant way to teach how knowledge is actually built — through evidence, not certainty. The most valuable question you can ask is “How do we know?” Nobody saw a dinosaur, yet we know a lot — because scientists reason carefully from fossils. That’s a powerful lesson: good thinking lets us understand things we can’t see directly. Lean into the detective angle. From a footprint, what could you figure out? (Size, whether it walked on two legs or four, maybe how fast.) That’s inference — drawing conclusions from clues — and it’s a skill they’ll use in every subject. Be honest about uncertainty, too: scientists once thought dinosaurs were sluggish and grey; new evidence suggests many were fast and feathered. Ideas changing isn’t a weakness of science — it’s the whole point. Encourage your child to ask “what would change your mind?” Finally, let them go deep on one favourite dinosaur and teach *you* about it. Expertise plus explaining is a fantastic confidence builder.
Frequently asked questions
How do scientists know about dinosaurs?
From fossils — bones, teeth, eggs, and footprints that turned to stone over millions of years. Scientists carefully reason from these clues to work out how dinosaurs looked and lived.
Why did the dinosaurs go extinct?
Most likely a massive asteroid hit the Earth about 66 million years ago, changing the climate so drastically that most dinosaurs couldn’t survive.
Are birds really dinosaurs?
Yes — scientists now agree that birds evolved from small feathered dinosaurs. So in a real sense, dinosaurs are still all around us.
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