Their makers claim they can detect dozens of cancer types — but some scientists say they could be missing many cancers or delivering the wrong diagnosis.

A resurrected ancient enzyme is helping scientists test how reliably Earth’s oldest rocks record signs of life.

On March 13, 1968, 320 gallons of VX nerve agent spilled into Skull Valley Utah. The following day, over 6,000 sheep were dead, exposing the Military's use of illegal chemical weapons.

The therapeutic revolution: medicine, meaning, and social change in nineteenth-century America -- Medical text and social context: explaining William Buchan's Domestic medicine -- John Gunn: ...