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Science Corner: October 2012 Archives

Why do wagon wheels seem to turn backwards in old movies?

Wheels appear to spin backward because of a stroboscopic effect. Movies are shot at 24 frames a second so if the wheels are not in sync with that speed, they will appear to be stopped, or moving backwards.

Concerns about methane and global warming

Bob Fournier brings us the latest research on the other greenhouse gas.

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After 200 years, scientists figure out how hummingbirds drink.

Science commentator Bob Fournier tells us about the latest research into humminbirds, and how they drink.

If you want to see hummingbirds drinking, you might want to check out these videos. The first is a wider view, and the second is magnified.

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