英语听力：探索发现 2014-07-04 BBC 地平线：陨石的真相-23（在线收听）

 As the divers have explored further, they discovered the Siluteis are actually part of a huge complex of tounels and caves.In fact, when you look from above, you can see Senluties scattered across hundreds of kilometers.And when they were mapped, it becomes clear they followed a distinctive circular course through the jungle.They mark the ring of giant crater.Scientific instruments showing the structure of underlined rock has been deformed,revealing the bounderies of a clossil meteorite impact crater.Wa, it's amazing, cavern is a part of bigger story, a much bigger story.65million years ago, this was the site of one of catastrophic impact in Earth's history.It became known as the Chiks meteorite landed here, and that triggered the extinction of dinosaors.