Astronomers have reconstructed the 22 million-year-long journey of the '2018 LA' asteroid that came crashing down into the Kalahari Desert in Botswana in 2018. It's the first time scientists have traced an asteroid to its source, in this case, Vesta in the asteroid belt. Researchers used NASA's hazardous asteroid-hunting telescopes and the ANU SkyMapper telescope in Australia for the task.