A group of researchers have identified two seismic events that they think provide the first evidence of strangelets or primordial quark matter passing through the Earth.
A team of researchers claims to have found evidence in seismic records for terrestrial impacts of truly strange theoretical particles called strangelets. The particles are said to have ripped through Earth, emerging from the other side virtually unimpeded in their supersonic travels.
FORGET dangers from giant meteors: Earth is facing another threat from outer space. Scientists have come to the conclusion that two mysterious explosions in the 1990s were caused by bizarre cosmic missiles, or "strangelets".