"READ Why Do Onions Make Me Cry?: Answers to Everyday Science Questions You've Always Wanted to Ask
b Discovery Channel host and acclaimed writer Jay Ingram helps you find the answers to questions you've never really settled, like 8220 What is d 233 j 224 vu? 8221 8220 Why do we blink? 8221 , 8220 Why are yawns contagious? 8221 and the perennial 8220 Do we really use only 10% of our brains? 8221 "