But how do you count zero, a number that is best defined by what it's not?Can you see it?Can you hear it?Can you feel it?This important math concept is beautifully explored in a way that will inspire children to find zero everywhere--from the branches of a tree by day to the vast, starry sky by night.

    And a huge fold-out chart compares the dinos to each other, from the tiniest Microraptor to Argentinosaurus, the largest animal to ever walk the land.*An NPR Best Book of 2013*