Jeff Bezos's Blue Origin rocket makes 12th test flight

Blue Origin, the space company owned by Amazon CEO Jeff Bezos, launched the 12th crewless test of its New Shepard rocket on Wednesday, pushing the first flights with passengers to 2020.

Faster heartbeat helps deer mice to survive at high altitudes

Mice living at high altitudes in the American West carry a genetic variant that increases their heart rate, helping them cope with the low oxygen levels that occur at high elevations. Rena Schweizer of the University of Montana ...

Tiny particles lead to brighter clouds in the tropics

When clouds loft tropical air masses higher in the atmosphere, that air can carry up gases that form into tiny particles, starting a process that may end up brightening lower-level clouds, according to a CIRES-led study published ...

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