Top news for December 21, 2008

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Challenging the Big Bang Puzzle of Heavy Elements: Earth Factories Creating Elements From Nuclear Transmutation

An atomic clock measured how general relativity warps time across a millimeter

<cite>Science</cite>’s Dance Your Ph.D. contest is now open, with an AI twist

China successfully tested hypersonic weapon in August: report

Mammalian motivation circuits: Maybe they’re born with it

Researchers identify brain circuitry in rodents that may be responsible for negative emotional aspects of pain

Fasting May Offer Health Benefits Beyond Dieting, Experiment in Mice Suggests

Space calendar 2022: Rocket launches, sky events, missions & more!

On This Day In Space: May 25, 2008: NASA's Phoenix spacecraft lands on Mars

NASA’s Lucy Launches on 12-Year Mission to Jupiter’s Trojan Asteroids