They shimmer, they dance, they take your breath away, but what really causes the Northern Lights? And could these beautiful displays be a warning sign from our Sun? In this video, The Science Channel, along with aurora scientist Emma Spanswick, travel to the icy wilds of Canada to uncover the truth behind one of Earth’s most awe-inspiring natural wonders. From cutting-edge cameras to solar storms strong enough to knock out satellites, this episode tales a look at the science, and danger, behind the aurora borealis.

[Via LS]