An curved arrow pointing right. Former planet Pluto may have been miscategorized yet again. A recent analysis of its atmosphere showed that it may be something we've never seen before — a comet ...

Two-month-old kitten Pluto is a high-climbing kitty for her forever home. You can find out more about her and how to adopt at bestfriends.org. Tail waggin Tuesday: Meet Pluto ...

Pluto is too far away from Earth to be seen with the naked eye. If you stood on Pluto's surface, the Sun would merely appear to be a very bright star. Although previous images showed that ...