Ancient Kilonova Unearthed: Evidence of a Nearby Cataclysmic Event 3.5 Million Years Ago

Scientists have discovered evidence of a kilonova, a cataclysmic event involving the merger of neutron stars or a neutron star and a black hole, that occurred 3.5 million years ago in our galactic backyard, about 500-600 light years away. The discovery was made through the analysis of isotopes, specifically Fe-60 and Pu-244, found in ocean sediments. The presence of Pu-244, which is only created in certain types of supernovae, suggests that a kilonova was the most likely source. The research also indicates that the kilonova had a specific debris ejection pattern and a certain tilt during the merger event. While the event did not pose a threat to life on Earth, it serves as a reminder of the dangers present in the universe.