The earliest well-preserved tetrapod may never have left the water
(PHYSorg.com Archaeology & Fossils)

Superbly preserved fossils from Russia, excavated by an international team and reported in the journal Nature, casts new and surprising light on one of the earliest tetrapods-the group of animals that made the evolutionary transition from water to land, and ultimately became the ancestors of amphibians, reptiles, birds and mammals.