A Force From The Milky Way May Have Shaped The Continents on Earth

Researchers suggest the Milky Way’s spiral arms may have influenced Earth’s continental growth.

As the Solar System passed through these arms, comet showers from the Oort Cloud may have triggered impact events.

Those impacts could be recorded in ancient zircon crystals through hafnium and oxygen isotope clues.

If confirmed, the idea would connect Earth’s geology to the broader galactic environment.