On today's Cool Science Radio, hosts John Wells and Lynn Ware Peek's guests will be:(01:00) Russell Foster who has written Life Time: Your Body Clock and Its Essential Roles in Good Health and Sleep. A guide to using the science of the body clock to promote better sleep, better health, and better thinking.(29:09) Then, National Geographic Explorers Steve Winter and Sharon Guynup. Their new book: The Ultimate Book of Big Cats: Your Guide to The Secret Lives of These Fierce, Fabulous Felines.