Watch | What causes the northern lights?

A video explaining the reason behind the origin of the northern lights that occurs in the Earth's polar regions

The aurora borealis, or northern lights, that appear in high-altitude regions have been fascinating people for thousands of years. It is a true curiosity of the natural world and a major tourist attraction. But the reason behind the origin of the northern lights has been a mystery. What causes this very specific light phenomenon that occurs in the Earth's polar regions has been speculated but never proven, until now.