Cataclysmic asteroid impacts have happened in the past and chances are they will happen again in the unforseeable future....
When a six-mile-wide( 10km) space rock struck the planet just off the coast of Mexico's Yucatan peninsula some 66 million years ago, the resulting chain reaction brought about the demise of dinosaurs....
More recently, in 2013, a 65. 5ft-wide( 20m) rock entered the atmosphere above Russia's Chelyabinsk oblast and exploded before it could hit the ground. The eruption crea
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每日快报-科学
2021-12-14 00:00:00.0