Ancient Evidence Unveils Nearby Kilonova 3.5 Million Years Ago

Scientists have discovered evidence of a nearby kilonova event that occurred approximately 3.5 million years ago. The presence of isotopes Fe-60 and Pu-244 in ocean sediments suggests the occurrence of a cataclysmic event, such as the merger of two neutron stars or a neutron star with a black hole. The specific ratio of these isotopes, along with simulations, indicates that the kilonova was located about 500-600 light years away from Earth. While this event did not pose a threat to life on Earth, it serves as a reminder of the potential dangers present in the universe.