Radionuclides trapped in a deep-sea sample point to an ancient cosmic event Nanowerk Radioactive Stardust From an Ancient Cosmic Blast Is Still Raining on Earth ScienceAlert 80,000-year-old Antarctic ice reveals radioactive stardust still falling on Earth. Is it dangerous? The Economic Times Deep-sea crust uncovers steady plutonium rain from ancient kilonova debris Phys.org