Over the weekend, Nature released a paper that takes a different tack towards sorting out the often complicated human family tree. Figuring ... the skull meets the spine, how much the jaw ...

(photo credit: Wikimedia Commons) Modern humans have been evolving and developing the ability to walk upright for over two million years, new research into a fossilized spine of an early human ...

sediba would have had a relatively straight spine ... in the trees – the team says that other features still indicate strong climbing adaptations. The creature walked like a human, but climbed ...