Tag #Late Ordovician Extinction

What is the proposed link between nearby supernovas and the two unexplained mass extinctions on Earth?

New research suggests that nearby supernovas may have contributed to two of Earth's largest mass extinctions, the Late Devonian and Late Ordovician events. Calculations indicate a supernova might affect Earth every 500 million years, aligning with the timing of these extinctions. This hypothesis proposes that supernova radiation could damage Earth's ozone layer, triggering environmental changes that cause mass die-offs.