Study: Cocoa Only Decreases Blood Pressure When Elevated

Vitamin D Supplements Don’t Help Another Condition, Study Finds

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.

New study shows how the ancient world adapted to climate change