Good guess! Some fossils are made of the soft tissues of a plant or animal. This fur is from that great prehistoric elephant, the mammoth. When mammoths walked the earth over 10,000 years ago, the climate was very cold. Some of them fell into icy crevices in glaciers, where their bodies were frozen, only to be "thawed out" many thousands of years later.

Crinoids look soft and flexible, like a plant. But these crinoid fossils do not preserve the soft parts of the creature. What are they?