After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

Extreme Weather Maps: Track the possibility of extreme weather in the places that are important to you. Heat Safety: Extreme ...

Tens of thousands of people are without power after tornadoes touched down in parts of central Oklahoma. Final Polls Are Out, ...