Yes, in some cases, an entire animal is preserved in ice, hardened tree sap (called amber), or in dry, desert areas. In these instances, as with woolly mammoths found in Alaska, Siberia, and elsewhere, the whole animal hair, skin, bones, internal organs is preserved much as it was when it died thousands of years earlier. During the last Ice Age, there were many large mammals, including mammoths, saber-toothed cats, giant ground sloths, woolly rhinos, and mastodons. These animals, which are now extinct, are known mostly from fossils and frozen, mummified carcasses.
- What were the first animals to appear in water and on land?
- What were the first primitive plants to appear on land?
- What are fossils?
- Which country pollutes Earth the most?
- What is Earth Day?
- What is acid rain?
- Why is it important to conserve water?
- Why do stars twinkle?
- Why is it important to recycle?
- What does the slogan “Reduce, Reuse, and Recycle” mean?
- How much garbage do we throw away every year?
- Do people still mine for gold in America?
- What is a carbon footprint?
- When do I send greenhouse gases in the air, and how can I make a difference?
- Are human activities responsible for the warming climate?
- How much oil is there left in the world?
- When was the greenhouse effect discovered?
- What is the greenhouse effect?
- What is the difference between a planet and a star?
- What is climate change, and how does it differ from global warming?
