Two craters in Canada may not have been formed by a binary asteroid . The Clearwater Lakes were thought to have both formed 460 million years ago . But analysis of rocks suggests the East lake is much older . It is thought to have been created separately 285m years ago . This means the craters were formed by an extremely unlikely coincidence of two asteroids landing in the same spot , 185 million years apart .
Two craters in Canada may not have been formed by a binary asteroid . The Clearwater Lakes were thought to have both formed 285m years ago . But analysis of rocks suggests the East lake is much older . It is thought to have been created separately 460 million years ago . This means the craters were formed by an extremely unlikely coincidence of two asteroids landing in the same spot , 185 million years apart .