NASA’sNew Horizons spacecraft has delivered extraordinary video footage showing towering ice mountains on Pluto’s moon Nix. These ice peaks, some rising as high as 11,000 feet, are made of pure water ...

It would be understandable if you stopped thinking as much about Pluto after it was “demoted” from being considered one of the nine planets sharing the Earth’s solar system to being classified as a ...

We classified Pluto before really understanding it—just like we reduce people to job titles or put names on relationships ...