The entire star system was bombarded with intense radiation, and only those lifeforms most able to withstand the bombardment survived.
整个星系饱受强烈辐射，只有最能经受辐射的物种幸存了下来。
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The ice on Themis 24 could be a sort of time capsule from the early solar system and could be similar to the ice that may have arrived on Earth from asteroids during the Heavy Bombardment.
And study of the pictures produced by this year's Lunar Reconnaissance Orbiter will allow scientists to build a history of asteroid bombardment of the inner solar system.