A small asteroid impacted Earth's atmosphere harmlessly on Sunday. Scientists spotted it just 6 hours earlier. It was the 13th asteroid spotted before impact.
If we ever find life beyond Earth, how will the nations of the world respond? A group of experts give 3 possibilities: cooperation, competition and isolation.
Cassiopeia the Queen is an easy-to-find constellation. It has the shape of a W or M. Look for it in the north-northeast sky on September and October evenings.