A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.

A 113-million-year-old hell ant fossil discovered in northeastern Brazil's Crato Formation represents the oldest known ant specimen in the fossil record. The remarkable preservation reveals ...

A badly crushed cranium unearthed decades ago from a riverbank in central China that once defied classification is now shaking up the human family tree, according to a new analysis.Related video above ...

Artificial cast of Germanasterias amplipapularia, holotype Nr. 18869a–b in abactinal view (A), and actinal view (B). (C) Details of the disc and arm in abactinal view. (D) Detail of the arms and oral ...

South American mammals present a fascinating case study in evolutionary biology, shaped by a dynamic interplay of palaeoenvironmental shifts, adaptive radiations and biogeographic isolation. The ...

A team from the University of Illinois has uncovered surprising evolutionary links between the genetic code and tiny protein fragments called dipeptides. By analyzing billions of dipeptide sequences ...