Supernovas may have triggered life-threatening changes in ancient Earth's climate. Scientists say it could happen again

Scientists have uncovered evidence that massive stellar explosions, called supernovas, might have bombarded Earth with intense radiation in the distant past, triggering extreme climate shifts. The scary part? It could happen again. While the odds are low, a nearby supernova could disrupt our atmosphere and pose serious risks to life on Earth—something researchers are keeping a close eye on.