Top news for December 21, 2008

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On this day in space! Oct. 14, 1947: Chuck Yeager smashes the sound barrier.

Study Puts a $43 Billion Yearly Price Tag on Cancer Screening

NASA’s Northrop Grumman Cygnus Continues to Space Station (successfully recovers from earlier propulsion glitch)

New Study Reveals Only 1 in 10 Age Gracefully – and Identifies the Key to Success

Cannibal AIs Could Risk Digital 'Mad Cow Disease' Without Fresh Data

One Group of People Might Benefit From Taking Fish Oil to Slow Alzheimer's

Olympic Track Stars Are Running on Crushed Sea Shells. Here's Why.

Hormone Discovery Could Explain Why Migraines Are Worse When Menstruating

First-Ever Sighting: Neutron Star’s Bizarre “Garden Sprinkler” Jet Captured

The Quick and the Curious: Discover the Mysterious New Creatures of the Deep Sea