Do Penguins Have Knees?

The fifth book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Culled from the thousands of letters submitted by desperate fans, Do Penguins Have Knees? answers 100 new and even more perplexing questions about food, popular culture, the human body, science, and more, such as:

• Why are the oceans salty?
• Why ...