Why Is Snot Green?

Discover the answers to important questions in this hilarious introduction to the world of science. Based on questions that the author fielded over and over as an educational presenter in a museum, Why is Snot Green? explains everything from black holes to belly-button lint in an easy-to-understand question-and-answer format. You'll find out what happens when you swallow a burp, why there aren't any more dinosaurs, where tsunami come from, and whether evil computers and robots will take over the world.