`Walking` fish help scientists to understand how we left the ocean
(PHYSorg.com Archaeology & Fossils)

Our ancestors` transition out of the water and onto the land was a pivotal moment in evolution. No longer buoyed by water, early tetrapods (animals with four limbs) had to overcome gravity in order to move their bodies. Exactly how those early pioneers first evolved the fundamental capacity to walk has fascinated scientists for many years.