Top news for December 21, 2008

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Europe's Ariane 5 rocket lifts off for final time

Shrinking Arctic glaciers are unearthing a new source of methane

How to Keep Muscles Strong as You Age

FDA Gives The Okay For Abbott’s New Minimally Invasive Pacemaker

How to Protect Diversity in Education from the Supreme Court's Assault

Portland, Tampa, El Paso Break Heat Records: Here’s Where Else Temperatures Are Hitting Record Levels

New Evidence Suggests 500-Million-Year-Old Creature Wasn’t A ‘Trilobite Killer’

Is Your Partner ‘Micro-Cheating’ On You? A Psychologist Offers Advice

The Paradox Of Predicting AI

4th Of July May Have Been Earth’s Hottest Day On Record—Here’s The ‘So What?’