From the Back Cover
Firefly light and the aurora borealis. Time travel and tears. Blood types, boomerangs, and black widow spiders. Explanations and investigations. A fact-filled, fun-filled, whimsically illustrated compendium, HOW COME? answers over 100 of the questions asked most frequently about the world around us.
It explains what a mirage is (an image caused by air bending light). How a cat can survive a high fall (because of the way its body acts like a parachute). And why, when someone else yawns, you want to yawn too (in primitive times, yawns may have been a way to synchronize group behavior).
So go ahead, ask it your best question.
Can you say why the sky is blue? Or explain how an X-Ray can take a picture of your child's bones? It's not easy to be knowledgeable in all walks of science, but here's lively help for when the questions start coming.