Source: Official Guide for GMAT Review 2016 Sentence Correction; #140

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Rock samples taken from the remains of

Rock samples taken from the remains of an remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.

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Mike McGarry, Magoosh Tutor

Aug 18, 2015 • Comment

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