After return of Boeing's Starliner spacecraft, company officials remain noticeably quiet
The Great Dying once wiped out 90% of life on Earth. A new theory may explain why
High-tech search for 1968 plane wreck in Michigan's Lake Superior shows nothing so far
The US is entering a riskier season for spread of H5N1 bird flu. Here’s why experts are worried
650-foot tsunami in Greenland fjord made waves that lasted 9 days, scientists find
Cave discovery in France may explain why Neanderthals disappeared, scientists say
Four civilians on a daring SpaceX mission are attempting the first commercial spacewalk
Tech billionaire pulls off first private spacewalk high above Earth
