69m_step3

全文播放

Earth in Danger
地球危機

	Seeing is believing. But seeing a huge rock half the size of Earth smash into Jupiter in July 1996 was incredible . Can you imagine what would happen if Earth collided with a huge space rock ? It would be disastrous . In fact, it is thought that a meteor killed the dinosaurs millions of years ago . ...
	眼見為憑，但目睹一顆有地球一半大的巨大石塊在西元一九九六年七月撞向木星卻令人無法置信。你能夠想像地球如果撞上太空中的一顆巨大石塊會怎麼樣嗎？那後果將不堪設想。事實上，有人認為在數百萬年前就是一塊隕石造成所有的恐龍滅絕。

	A rock like the one that hit Jupiter could split Earth in two. Doing nothing about it is like waiting for the end of the world. So scientists plan to start a project to identify all space rocks that could hit Earth . ...
	一顆像撞到木星那樣的岩石便可把地球撞成兩半。如果不提出對策就無異於等待地球末日的來臨。因此科學家打算展開一項計畫來辨識所有可能擊中地球的隕石。