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Tag College of Letters & Science

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.

Curiosities: What’s the difference between dishwasher detergent, laundry detergent and dish soap? Why aren’t they interchangeable?

July 26, 2010

All detergents — whether intended for hands, hair, clothes or dishes — work on the same principles: Break up oils and dirt and wash them…