Gravitational friction--the pull of the moon's gravity on the Earth--slows down the planet's rotation ever so slightly.
- AP Video
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Do you agree with the U.S. Supreme Court's decision last week allowing Hobby Lobby to limit the contraception choices it offers its employees?
Audio: How can we better prepare for tornadoes?
An NPR broadcast examines the question of how communities can better prepare for tornadoes like the one that struck Moore, Okla. on Monday. The broadcast features commentary from Michael Fitzgerald, who reported a five-part disaster series for the CNHI News Service.
May 22, 2013 1 Photo
- Photos: Aftermath of massive tornado in Moore
- The Big One: Preparing for mid-America earthquake
- Audio: How can we better prepare for tornadoes?