1001
Space
Earth
Nature
Evolution
Dinosaurs
Simple Animals
Insects and Spiders
Fish
Amphibians
Reptiles
Birds
Sea Mammals
Land Mammals
Plant Kingdom
How Plants Live
Unusual Plants
Ecology
Conservation
Animal Behaviour
Pets and Farm Animals
History
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What were the first animals like?
The first animals were probably single-celled creatures. The first animals we know from the fossil record occurred about 570 million years ago. Some were wormlike; others had shells. They probably lived in water.
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Early fossils
 
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1001
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Nature
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Fossils and Prehistoric Life