Violent Supernovae May Have Triggered 2 Mass Extinctions

Could Supernovae Have Triggered Ancient Mass Extinctions on Earth?
Exploding stars in near-solar space may have triggered at least two mass extinction events in Earth’s history. A new study led by astrophysicist Alexis Quintana from the University of Alicante suggests that supernovae—the violent deaths of massive stars—could be responsible for the Late Ordovician and Late Devonian extinction events.
Two of Earth's mass extinctions were caused by something much worse than asteroids
The rate of stars going supernova near Earth appears to match two mass extinctions -- 372 million years ago and 445 million years ago.
Violent Supernovae Could Have Triggered at Least 2 Extinction Events
Exploding stars in near-solar space may have triggered at least two mass extinction events in Earth's history. An analysis of the frequency of supernova explosions in the Milky Way, led by astrophysicist Alexis Quintana of the University of Alicante in Spain,
Violent supernovae 'triggered at least two Earth extinctions'
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,
Supernovae Linked to Two Earth Extinctions
At least two mass extinction events in Earth's history were likely caused by the "devastating" effects of nearby supernova explosions, a new study
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Ordovician Period
These first steps toward life on land were cut short by the freezing conditions that gripped the planet toward the end of the Ordovician. This resulted in the second largest mass extinction of ...
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Infographic: A Look at the Big Five Mass Extinctions
although it’s unclear if whether that amounts to a sixth mass extinction. The Ordovician-Silurian mass extinction event may have wiped out some 85 percent of species, including many of the ...
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Supernova study suggests space blasts wiped out ancient life on Earth
At least two mass extinction events in Earth's history were likely caused by the "devastating" effects of nearby supernova ...