An illustrated STEM encyclopedia covering the top 100 words that kids need to know. Do you know all about Atoms? Or what Bioluminescence is? Discover these terms and more in this illustrated STEM encyclopedia. Organized in alphabetical order and each concept beautifully illustrated with humor and charm, these 100 essential words will fascinate scientifically minded young readers, from those ABCs all the way down to X-rays, the terrifying Yangchuanosaurus and even the true def