For panspermia to occur, however, microorganisms need to survive not only ejection from the first planet and atmospheric entry to the second but the interplanetary voyage itself.

然而，胚种说真要发生，微生物除了从第一颗行星喷发、进入第二颗行星的大气时必须幸存之外，还要能在整个行星际旅程中保住小命。

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The whole event, from the meteor's atmospheric entry to its disintegration in the air above central Russia, took 32.5 seconds, NASA said.

CNN: Russia starts clean-up after meteor strike

It remains unknown where the segment fit into the wing, but it included reinforced carbon-carbon material, which protects the leading edge of shuttle wings from the 3, 000-degree Fahrenheit heat of atmospheric re-entry.

CNN: Piece of shuttle left wing identified