article_snippet.sent: the young Earth may have collided with a body similar to the planet Mercury, says a new paper.
article_snippet.sent: Oxford scientists say a Mercury-like body struck the young Earth.
article_snippet.sent: To address this discrepancy, scientists believe that the young Earth was hit by a body that was the size of Mars - but like Mercury in Mercury composition - early in Mercury life.
article_snippet.sent: Now scientists think that the young Earth was hit by a body that was the size of Mars, but like Mercury (right) in Mercury composition, early in Mercury life.
highlights_snippet.sent: Oxford scientists say a Mercury-like body struck the young Earth .
  