The video explains how fossils, which are remains or marks left by ancient organisms, are formed and preserved over millions of years. It describes different types of fossils, such as impressions and whole organisms, and highlights the fossilization process. The video also discusses the significance of fossils in understanding extinct life forms, using examples like Archaeopteryx and ammonites. Finally, it covers the discovery of dinosaur footprints and their preservation through fossilization.

What can fossils tell us about extinct life forms?

Explain the process of fossilization.