TINY meteorite fragments found in Antarctic rocks are the best evidence yet that the Earth’s worst ever mass extinction was caused by an impact from space.
Around 70 per cent of land species and more than 90 per cent of marine species, including trilobites, were wiped out at the end of the Permian period 250 million years ago. Experts haven’t been able to agree on what caused the destruction, although an ice age, volcanic eruption and an asteroid or comet impact have all been suggested.
Now Asish Basu of the University of Rochester in New York state and his colleagues…
