Before the evolution of legs from fins, the axial skeleton - including the bones of the head, neck, back and ribs - was already going through changes that would eventually help our ancestors support ...

A visualization of Tiktaalik roseae, an extinct aquatic animal with fossils that shed light on the evolution of land animals from marine animals millions of years ago. Nobu Tamura via Wikimedia ...

There are many mysteries of the ocean that still baffle scientists. Most of the time, this revolves around unique sea ...