In the kits, the coprolite (1), theropod track (17), and synapsid track (18) are trace fossils. Unaltered hard parts - The body fossil is made up of exactly the same material as when it entered the ...

The fossil may have lost water, or color, or the proteins of the soft tissue may have degraded. Unaltered hard parts: teeth and very recent shells, bone or shell encased in petroleum or in ...

NASA’s Lucy is a record-breaking mission that will study a record-breaking 11 asteroids across the Solar System. Three of ...