Exploding stars in near-solar space may have triggered at least two mass extinction events in Earth’s history. A new study ...

At the center of most large galaxies, including our Milky Way, sits a supermassive black hole. These powerful objects sometimes enter active galactic nucleus (AGN) mode, where they pull in gas and ...

These rays could break apart molecules in the atmosphere, leading to ozone depletion and exposing Earth to unfiltered UV radiation. Without an ozone layer, Earth would be vulnerable to intense UV ...