Supernova explosions may have helped shape Earth’s climate history – Livescience.com

Star explosions may have played a greater role in Earth’s climate history than scientists thought.
Nearby supernovas
have left a series of possible fingerprints in the tree-ring record here on Earth over the past 40,000 years, potentially disrupting our planet’s climate multiple times over this span, a new study reports.
“These are extreme events, and their potential effects seem to match tree-ring records,” study author Robert Brakenridge, a senior research associate at the Institute of Arctic…

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