地球的力量 第5集稀有行星(5):納米比亞
這是個巨大的隕石坑
It was blasted out of the Earth's crust 50,000 yearsago.
五萬年前與地球地殼相撞形成的
Well, there it is, Meteor Crater.
就是它了，隕石坑
This place really gives you a sense of the destructive power of incoming meteorites.
這個地方讓你明白 小行星的破壞力
The blast here would have vaporised a city larger than London.
這里的爆炸可以毀滅一個比倫敦還大的城市
But the lump of rock that did it measured almost 80 feet across.
但是造成這個破壞的巖石直徑還不到30米
The impact exploded with a force 70 times greater than the atom bomb.
這次沖擊爆炸力要比原子彈強70倍
But what makes this massive crater so significant
但是這個巨大的坑之所以意義深刻
isn't how big it is, but how rare it is.
并不是因為它多大而是因為它多么少見
Because although it might not look like it, space is a hazardous place.
也許看起來不像但是太空是個很危險的地方
There are millions of objects that cross Earth's path at thousands of miles per hour.
幾百萬的物體都朝地球來 每小時幾千公里的速度呼嘯飛來
With so much debris up in space, Earth should be hit much more often.
在太空有這么多的碎片地球應該經常被擊中才對
Other craters do exist but they're few and far between.
雖然有其他的隕石坑但它們卻寥寥可數
This one is in Namibia.
這個就是在納米比亞
