A cozy hug is one meter wide, a good night's sleep is 41,400 seconds long, and an African elephant weighs almost 5,500 kilograms. No matter where you are in the world, scientists use these same units of measurement to communicate with one another. Talking Science brings science vocabulary to life for even the youngest children. Written by award-winning children's book author Mary Wissinger, with inviting and fun illustrations by Lilia...