article_snippet: Two neighbouring ancient craters thought to be have been formed by the same impact event are now thought to have been created by two separate asteroids.
article_snippet: While both had been thought to be 285 million years old, it now appears one of Two craters in Canada is actually 450 million years old but, by chance, was created in almost exactly the same spot.
article_snippet: Two craters in Canada Canada may not have been formed by a binary asteroid.
article_snippet: The remarkable finding, if confirmed, has important implications for other so-called 'doublet' craters in the solar system, previously thought to be formed by binary or multiple rocks impacting at the same time.
article_snippet: The remarkable finding, if confirmed, has important implications for other so-called 'doublet' craters in the solar system, previously thought to be formed by binary or multiple rocks impacting at the same time.
article_snippet: Despite the fact that it is statistically very unlikely for the two craters to have been formed in two separate impact events, the new evidence unearthed by the team shows that in this case the more unlikely scenario is true. '
highlights_snippet: Two craters in Canada may not have been formed by a binary asteroid .
  
highlights_snippet: This means Two craters in Canada were formed by an extremely unlikely coincidence of two asteroids landing in the same spot, 185 million years apart .