Ancient Herpes Viruses Might Have Spread Through Kissing

Stonehenge was likely and ancient solar calendar. According to a new study, a circle of 30 upright "sarsen" stones marked the days each month. Four stones on the outside of the circle tracked leap years. The top of the circle illuminated during summer solstice, and the bottom during winter solstice.

Ancient Europeans farmed dairy—but couldn’t digest milk

Famine and disease may have driven ancient Europeans’ lactose tolerance