Name: 點樣防止小行星撞地球
Uploaded: 2011-11-21T15:57:42Z
Duration: 13 min 59 s
Description: 咩嘢寬六英里而且可以瞬間毀滅文明？係小行星。太空有大把小行星。Phil Plait 用幽默同埋遠見話畀 TEDx 博爾德嘅觀眾知，小行星造成毀滅嘅所有方式，同埋我哋應該點樣做先可以避免佢哋。

Phil Plait: 點樣防止小行星撞地球

點樣防止小行星撞地球

咩嘢寬六英里而且可以瞬間毀滅文明？係小行星。太空有大把小行星。Phil Plait 用幽默同埋遠見話畀 TEDx 博爾德嘅觀眾知，小行星造成毀滅嘅所有方式，同埋我哋應該點樣做先可以避免佢哋。

Asteroids have wiped out 75 percent of species before, but humanity now holds the tools to prevent another catastrophic impact. Even a mile-wide rock can unleash an explosion rivaling a 20-megaton bomb, while smaller ones can still shatter cities. Advances in telescopes and space technology let scientists find and even nudge threatening asteroids. Unlike the dinosaurs, humans can spot these dangers and push them aside.