Tag College of Letters & Science
Curiosities: Why do some planets have rings?
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?
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.