800,000 years ago, a huge meteorite hit Earth. Scientists may have just found where.
In 2011 geologist Kerry Sieh and his husband were shopping in Ho Chi Minh City, Vietnam, when they popped into a little jewelry shop to check out the country’s famous rubies and spinels. But once inside, a set of glassy, black blobs on the wall behind the counter caught Sieh's eye.
“Tektites,” announced the cashier, handing over a photocopied paper that indicated they formed in a mysterious meteorite strike—Earth’s last major impact, in fact, a catastrophic collision that could have been witnessed by our ancient hominin relatives......