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 ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Over 390 million years ago, the ancestors of modern land ...