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The Hindu
The Hindu
Technology
The Hindu Net Desk

Watch | What causes the northern lights?

In this Friday, March 9, 2012 photo, an aurora borealis swirls in the sky over the Yukon River village of Ruby, Alaska (Source: AP)

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.

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