Imagine a fish with legs! Once upon a time, there really was an animal that looked like a fish with legs. Most scientists believe that about 400 million years ago it swam in the warm, green waters...
Fish in armor
According to most scientists, the fishes that swam in the seas 430 million years ago were covered with hard, bony armor. They had no jaws like the fish of today. Their mouths were just holes in the...
Strange sea animals
Scientists say that five hundred million years ago all plants and animals lived in the sea. There were sponges, jellyfish, worms with legs, and things like clams. And there was another animal that...
Animals of Long Ago
Imagine animals like fish with legs. Imagine trees like giant feather dusters. That's what some animals and trees looked like, once. Just as you change as you grow older, the world changes and the...
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