New study examines rare sedimentary rocks atop some of the planet's oldest large land masses.

Charles Q. Choi, Contributor

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The fastest-spinning white dwarf on record completes a full rotation in 25 seconds.
Charles Q. Choi, Contributor
Devices that nudge the rich and middle class to exercise don't offer same boost to those with lower incomes.
Brian Owens, Contributor
A particle accelerator-powered imaging tool has opened new windows into human anatomy.
Haley Weiss, Staff Writer
Robots and self-driving cars could deliver packages efficiently. But will they create new hazards?
Krystal Vasquez, Contributor
Iodine-based ion propulsion could power small satellites and help solve our space junk problem.
Jessica Orwig, Contributor
If the world can limit future greenhouse gas emissions, scientists are hopeful that adaptations can help a battered industry survive.
Benjamin Plackett, Contributor

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