The call to get more fiber into your diet used to provoke some eye-rolling. Fiber is not exactly the most glamorous nutrient.

Cosmic Leviathan: A galaxy cluster, resembling a submerged sea monster, distorts spacetime around it, as captured by the Hubble Space Telescope. Star Mira HM Sge: Hubble captures Mira HM Sge ...

NASA had just launched the Swift satellite about a month before. Swift was designed to detect high-energy cosmic explosions from billions of light-years away, yet it was unprepared for SGR 1806-20 ...