Giant solar flare captivates in HD

NASA's Solar Dynamics Observatory captures high-definition images and video of a dramatic solar flare not aimed at Earth.

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Force Friday and the best of IFA 2015

Attention Jedi in training: today is Force Friday. Also, the best of IFA 2015, a new personal safety app explodes in popularity, and new 21.5-inch iMacs are coming.

by Jeff Bakalar