The Earth supports the only known life in the universe, all of it depending heavily on the presence of liquid water to facilitate chemical reactions. While single-celled life has existed almost as ...

Imagine smoke rings seen edge-on and you may gain some insight to what's going on with the deceptive Red Rectangle, which isn't a rectangle at all. The optical illusion is the work of a pair of stars ...

Concept design for a rectangular space telescope, modeled after the Diffractive Interfero Coronagraph Exoplanet Resolver (DICER), a notional infrared space observatory, and the James Webb Space ...