Tag - Theory

Scientists Propose Surprising New Theory On Echidna Origins

Credit: PixabayA new study of a 100-million-year-old fossil found in an Australian coastal rock suggests that echidnas may have descended from aquatic ancestors.This is rare—unlike most mammals that moved from land to water, echidnas seem to have gone the other way.Debate Over the Fossilized Arm Bone: Terrestrial Ancestor or Aquatic Monotreme?Since unearthing the fossilized...