CHAMPAIGN, Ill. — Fleshy tube feet preserved in a rare fossil suggest an ecological shift through time, and may settle a long-standing debate about the preservation of soft parts, say paleontologists ...

The end of the Pliocene marked the beginning of a period of great climatic variability and sea-level oscillations. Here, based on a new analysis of the fossil record, we identify a previously ...

Animals have adapted to diverse thermal environments from cold to hot. During the course of thermal adaptation processes, preferred thermal ranges for survival shift among species adapted to different ...