
What causes the sky near Earth's poles to light up with swirling, colorful light? In this episode of the Countdown, we explore the physics behind auroras and more. ...
http://www.scientificamerican.com/video.cfm?id=5-remarkable-facts-abou

What causes the sky near Earth's poles to light up with swirling, colorful light? In this episode of the Countdown, we explore the physics behind auroras and more. ...
http://www.scientificamerican.com/video.cfm?id=5-remarkable-facts-abou
0 comments:
Post a Comment