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Tag College of Letters & Science

Curiosities: Why do some planets have rings?

October 18, 2010

Saturn imaged by the Cassini Orbiter. Image: courtesy Jet Propulsion Lab Planetary ring systems are complicated, notes UW Space Place…

Curiosities: Why do sharks have to swim constantly?

August 30, 2010

For two reasons, says James Kitchell, professor of zoology at UW–Madison. First, sharks lack the swim bladder that most fish use to adjust their buoyancy.