In Relativity Now for Teens & Tweens: Einstein's Theories Explained, readers will gain insight into the nature of time, gravity, light, and the very fabric of our universe. Along the way, cartoon dogs demonstrate the theories of Special and General Relativity.The Relativity Now books have been described as "brilliant, unprecedented, and mind-blowing!" So what are you waiting for? Time is running out!Intended Audience/Other Editions: This edition has been designed for teens and tweens. (Our base edition is for "grown-ups, " and we also have an edition for "relatively small people, " ages 5-7.)