Which weighs more, a pound of lead or a pound of feathers? How many ants does it take to steal a piece of cake? Life-size photos and a clever text explore conce

How do we get fourth-grade writers to revise? And once we do get them thinking about revision, what, exactly, do they do? What do we do? In Patterns of Revision

This absorbing and surprising book measures and compares a huge variety of different subjects: the strongest animals, the biggest poopers and eaters, the amount

Explores time and how we think about it in a different way--as a series of events in the natural world, some of them directly observable, others not.

A fascinating compendium featuring over 70 unusual animal species. What's in a name? This lively, illustrated celebration is jam-packed with creatures notable f