地球的力量 第5集稀有行星(5):纳米比亚
这是个巨大的陨石坑
It was blasted out of the Earth's crust 50,000 yearsago.
五万年前与地球地壳相撞形成的
Well, there it is, Meteor Crater.
就是它了，陨石坑
This place really gives you a sense of the destructive power of incoming meteorites.
这个地方让你明白 小行星的破坏力
The blast here would have vaporised a city larger than London.
这里的爆炸可以毁灭一个比伦敦还大的城市
But the lump of rock that did it measured almost 80 feet across.
但是造成这个破坏的岩石直径还不到30米
The impact exploded with a force 70 times greater than the atom bomb.
这次冲击爆炸力要比原子弹强70倍
But what makes this massive crater so significant
但是这个巨大的坑之所以意义深刻
isn't how big it is, but how rare it is.
并不是因为它多大而是因为它多么少见
Because although it might not look like it, space is a hazardous place.
也许看起来不像但是太空是个很危险的地方
There are millions of objects that cross Earth's path at thousands of miles per hour.
几百万的物体都朝地球来 每小时几千公里的速度呼啸飞来
With so much debris up in space, Earth should be hit much more often.
在太空有这么多的碎片地球应该经常被击中才对
Other craters do exist but they're few and far between.
虽然有其他的陨石坑但它们却寥寥可数
This one is in Namibia.
这个就是在纳米比亚
