HumansMysterious holes in Andean mountain may be an Inca spreadsheet Thousands of holes arranged in a snake-like pattern on Monte Sierpe in Peru could have been a monumental accounting device for trade and tax News
Humans'Pregnancy test' for skeletons could help reveal ancient mothers Progesterone, oestrogen and testosterone can be detected in skeletons over 1000 years old, offering a way to identify individuals who died while pregnant or soon after giving birth News