Massive star explosions may have triggered two mass extinctions in Earth’s past: ‘It would be terrifying.’ Latest from Space.com

Massive star explosions may have triggered two mass extinctions in Earth’s past: ‘It would be terrifying.’ Latest from Space.com

 Two nearby explosive massive star deaths, or supernovas, may have triggered mass extinction events in Earth’s distant past, new research suggests.  

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Latest from Space.com