Is Earth a 4.5 Billion-Year-Old Paleo-Dark Matter Detector

Dark Matter Before Big Bang


Researchers are proposing the idea of using our planet itself as a “paleo-detector” to solve the enduring mystery of dark matter: Earth has been orbiting through interplanetary space for some 4.5 billion years, during which time it must have been penetrated by a new form of dark matter known as massive, super-heavy gravitinos. Strong and electromagnetic interactions with known matter may make this new form of dark matter particles with large mass, easier to track down despite their extreme rarity.