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Clues from the Past
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| Animals of Long Ago and Today |
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| | Scientists found fossil eggs with tiny dinosaur bones inside them. |
| | Fossil dinosaur nests offer clues to how dinosaurs lived. |
| | Some dinosaurs may have laid their eggs together to keep them safe. |
| | Some kinds of dinosaurs may have cared for their young. |
| | Scientists learn how dinosaurs lived from fossils and by looking at animals that live today. |
| | The alligator covers its nest with plants to help the eggs hatch. |
| | Some birds use nesting grounds to raise their young safely. |
