A "cataclysmic" collision some 4 billion years ago between Uranus and another massive object forever changed the evolution of the giant planet, a new study suggests.
Uranus, the seventh planet from the sun, "spins on its side, with its axis pointing almost at right angles to those of all the other planets in the solar system," said study lead author Jacob Kegerreis, a researcher at Durham University in the United Kingdom.
Yet, one of the biggest, most obvious evidences of a glancing blow to a planet... Gets explained as something else.
That big gash on Mars. You can't find a more obvious example of a glancing blow by another object. Yet they insist it's a natural canyon, like our grand canyon.