Violent supernovae 'triggered at least two Earth extinctions,' study suggests - Tech and Science Post

Supernova explosion blamed for two extinction events on Earth

Some of the most massive and influential stars in the universe are OB stars. These blue giants, many times more massive than the Sun, are short-lived but powerful forces that shape their surroundings. They are crucial in understanding star formation, galactic structure, and even planetary evolution. Their intense radiation ionizes surrounding gas, creating glowing HII regions and bubbles of charged particles. These processes influence the inters…

Violent supernovae 'triggered at least two Earth extinctions,' study suggests - Tech and Science Post

At least two mass extinction events in Earth’s history were likely caused by the “devastating” effects of nearby supernova explosions, a new study suggests. Researchers at Keele University say these super-powerful blasts—caused by the death of a massive star—may have previously stripped our planet’s atmosphere of its ozone, sparked acid rain and exposed life to harmful ultraviolet radiation from the sun. They believe a supernova explosion close …