Tree Rings May Hold Clues to Impacts of Distant Supernovas on Earth

The remnants of a supernova in the Large Magellanic Cloud, a dwarf galaxy that sits close to the Milky Way.

The remnants of a supernova in the Large Magellanic Cloud, a dwarf galaxy that sits close to the Milky Way. (Image: The Hubble Heritage Team via NASA / ESA / HEIC)