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First Alert Weather In-Depth: How do the Northern Lights work?

ROCHESTER, N.Y. — For the past four nights in a row, Rochester has been treated to one of Mother Nature’s most amazing phenomena, the Northern Lights. But what exactly are the Northern Lights, and how ...

Here's how traffic lights actually work, and how they detect your car

A surprising amount of technology might be making that red light hold you up. Here's how traffic lights detect (or don't ...