Nestled on a hillside in Guangdong Province near Zhaoqing City, the Jinlin crater managed to hide in plain sight until researchers identified it as an impact structure. Only about 200 confirmed impact craters exist worldwide, making each discovery scientifically valuable. But this one stands out for its exceptional size and youth. The crater formed during the Holocene epoch when the last ice age ended roughly 11,700 years ago. Related: Strange Glass in Australia Reveals a Massive Impact We