Key PointsEarly Earth's atmosphere contained carbon dioxide, methane, nitrogen and water vapor, but it was virtually devoid of free oxygen.The ...

Alabama has set a June execution by nitrogen gas for a man convicted of killing two people during a 1998 robbery of a pawn shop. Alabama Gov.

A research team with scientists from MARUM—Center for Marine Environmental Sciences at the University of Bremen studied the ...

In a world first, the team, led by Professor Stephen Liddle, discovered a new type of aromatic molecule made entirely of ...