Top news for December 21, 2008

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13 great Amazon Prime Day supplement deals

Amazon Prime Day is over – these are the best fitness tracker deals still available

Vega-C lifts off on successful maiden flight

Mysterious cosmic 'heartbeat' detected billions of light-years from Earth

Scientists propose solution to a long-puzzling fusion problem

What's next for the James Webb Space Telescope?

This octopus-inspired glove helps humans grip slippery objects

On This Day In Space: Nov. 18, 2013: NASA launches MAVEN orbiter to Mars

NASA's James Webb Space Telescope mission: Live updates

Fitbit vs Apple Watch: Which should you buy?