Hawaii's Kilauea volcano resumes dazzling show with lava fountains
Venus passes between the Earth and sun this weekend — but don't try to look for it
Encrypted messaging apps promise privacy. Government transparency is often the price
Researchers find hint at how to delay Alzheimer's symptoms
Amazon sues Consumer Product Safety Commission over recall order
How will the universe end? A changing understanding of dark energy may provide a new answer
Who else has been stuck in space? A short history of long spaceflights
European telescope studying the dark universe unveils new images of distant galaxies
