Large meteor impacts may have occasionally thickened and warmed the atmosphere.

大型陨石的撞击则可能偶发的使大气密度及温度增加。

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A more likely cause, Dr. Tapley said, would be a large meteor burning up as it entered the atmosphere.

Tapley博士说，一种可能是一颗大流星在进入大气时燃烧。

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A strong earthquake with large meteor crashed, let the home becomes a familiar sight human purgatory.

强烈的地震伴随大量陨石的坠落，让眼前熟悉的家园变成了人间炼狱。

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Our rough calculation says a large meteor impact on the same day as closest passage of the DA14 asteroid is really improbable.

CNN: A meteor and asteroid: 1 in 100 million odds

As researchers studied images of the McLaughlin Crater, a crater 57-miles across and 1.4 miles deep that formed as the result of an impact with a large meteor, they noticed sedimentary rocks.

FORBES: NASA Finds Remains Of Ancient Martian Lake

Large pieces of the meteor have yet to be found.

WSJ: Russia Meteor Was Largest in More Than a Century