英语听力：探索发现 2014-06-22 BBC 地平线：陨石的真相-18（在线收听）

 Down on the ground, the scale of impact is even more breathtaking.The crater is more than 1000 meters across and nearly 200 meters deep.The forces here were enoumous.The impact on this solid rock into this pulverized mochi,just bustled in your hand.You may look at that.They started as the same cane of rock.The meteorite that strikes here is about the same size of one that flattened Tonguska.But there's a critical difference.At the Barringer,the meteorite exploded in the atmosphere.That struck the ground.So this is just the fragement of true devastation unleashed here.Fortunately, to understand exactly why the grown strike is so destructive, we don't have to wait another Brringer to happen,because today we can simulate the same kind of impact.And that's thanks to the research of Pithues and one very special piece of equipment.