40 years ago, a comet came out of the blue in a surprise Earth flyby. Here's what we know now.

Iron-Rich Meteoritic and Volcanic Particles May Have Promoted Origin of Life Reactions on Early Earth

'Star Wars: Return of the Jedi' at 40: What it was like seeing Darth Vader's death scene for the 1st time

Could The Supreme Court Ruling On Wetlands Weaken U.S. Hurricane Defenses?