A new study suggests that the explosive deaths of the universe's earliest stars created surprising quantities of water that ...

The best smoke detector can provide an important first line of defense from fire. We recently put the top smoke detectors to the test. See which ones performed best.

The mathematics of hypersonic flight primarily involves fluid dynamics, thermodynamics, and gas dynamics, particularly ...

The phase and the group velocity of light propagating in conventional optical media cannot exceed the speed of light in ...