Why King Tut Had A Meteorite Knife

What do you get the boy pharaoh who has everything? A dagger made out of meteorite iron, of course. 
"Homo naledi, hand (Hawks version)" by John Hawks - http://www.eurekalert.org/multimedia/pub/99005.php. Licensed under CC BY-SA 3.0 via <a href="https://commons.wikimedia.org/wiki/File:Homo_naledi,_hand_(Hawks_version).jpg#/media/File:Homo_naledi,_hand_(Hawks_version).jpg" target="_blank">Wikimedia Commons</a>

Homo Naledi: Our Newly Discovered Ancestor

Found in a cave in South Africa, the fossils have been determined to be from Homo naledi, a previously unknown ancestor of the human species.

Why We Really, Really Hate Being Alone

Why do we hate to be alone? It may have to do with saber toothed tigers.