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H
ow do we know what plants and animals looked like a very long
time ago? We look at
fossils
. Fossils are the remains of plants
and animals that lived a long time ago. Scientists study fossils
to learn about past environments. Scientists who study fossils are
paleontologists
.
Dinosaurs lived a long, long time ago. No dinosaurs are living today.
But scientists know a lot about dinosaurs by studying their fossils.
Fossils
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