By Katie Hunt, CNN
Updated 2:00 PM ET, Wed March 31, 2021
A micrograph of impact particles from the Sør Rondane Mountains, Antarctica, is shown here.Tiny particles recovered from the summit of a mountain in Antarctica are clues that a meteorite more than 100 yards wide exploded in the sky 430,000 years ago, sending a fireball of vaporized extraterrestrial material to the icy surface, according to new research.