Fossils are rare because their formation and discovery depend on chains of ecological and geological events that occur over deep time. Only a small fraction of the primates that have ever lived has ...

A 183-million-year-old ichthyosaur from Germany has given scientists their clearest answer yet to a long-standing puzzle: how did ancient marine reptiles leave behind fossils so well preserved that ...

Scientists found preserved blood vessel structures in a T. rex fossil, offering new insight into dinosaur healing and fossilization.

How Did These Strange, Ancient Organisms Turn into Such Remarkable Fossils? New Research in Geology reveals why the 570-million-year-old Ediacaran Biota were so exceptionally preserved. Boulder, Colo.