Three people missing in Colorado wildfire

Three people are missing after a wildfire tore through several Colorado towns, quickly destroying nearly 1,000 homes as part of the latest in a string of US natural disasters.

Q&A: What touching an asteroid can teach us

The University of Arizona-led OSIRIS-REx mission will make NASA's first attempt at collecting a sample from an asteroid on Oct. 20. The sample, which will be returned to Earth in 2023, has the potential to shed light on the ...

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