Supernovae and Extinction Events
Recent research suggests there may be a link between a supernova about 2.6 million years ago and the extinction of a large number of marine megafauna on the Earth at the time.
X-Rays
Now Chandra has a glitch
The Chandra X-Ray Observatory has developed a glitch and gone into safe mode. The 19 year old spacecraft is well past it’s design life but continues to produce incredible science so hopefully it’ll be back to full serviceability very soon.