Earth received water toward the final stages of its formation. This reshapes understanding of the conditions needed for life.

Near-Earth asteroid Bennu has a slim chance of colliding with Earth in 2182. If it does, the impact could trigger a global winter that affects our planet for years.

Four planets will be in the parade in January, while seven will align in February. Here's how to see the events.

New measurements indicate that the Moon formed ... through a series of further impacts known as the "Late Veneer Event." As the Earth was hit much more frequently by these impacts than the Moon ...