Top news for December 21, 2008

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Scientists Solve 40-Year Mystery Over Jupiter’s Spectacularly Powerful X-ray Aurora

In Reversal, F.D.A. Calls for Limits on Who Gets Alzheimer’s Drug

Scientists use artificial intelligence to detect gravitational waves

Thyroid cancer now diagnosed with machine learning-powered photoacoustic/ultrasound imaging

Virtual learning may help NICU nurses recognize baby pain

The giant panda's mystery revealed

NASA, Northrop Grumman Finalize Moon Outpost Living Quarters Contract

Virgin Galactic will launch billionaire Richard Branson into space today. Here's how to watch it live.

Dying cells protect their neighbors to maintain tissue integrity

How otters' muscles enable their cold, aquatic life