Sara Gilbert

This book describes diggers, including their parts, tools, and construction work.

"An elementary exploration of monster birds, focusing on fossil evidence that helps explain how their wide wings and long feathers helped these beasts adapt to the last Ice Age"--

"An introduction to the life and era of the fearsome, carnivorous dinosaur known as Tyrannosaurus rex, starting with the creature's 1902 discovery and ending with present-day research topics"--Provided by publisher.

A basic introduction to the features and functions of drilling machines, examining the forms they have taken from ancient times to today.

"A look at the origins, leaders, growth, and management of the NFL, the professional football league that was formed in 1920 and today governs 32 teams throughout the United States"--Provided by publisher.

"A look at the origins, leaders, growth, and products of Amazon.com, the electronic commerce company that was founded in 1994 and today is the largest online retailer in the United States" --Provided by Publisher.

An elementary exploration of canyons, focusing on the geological evidence that helps explain how and where they form and spotlighting famous examples, such as Arizona s Grand Canyon.

An elementary exploration of earthquakes, focusing on the geological evidence that helps explain how and where they form and spotlighting famous examples, such as the 2004 Indian Ocean quake.

An elementary exploration of geysers, focusing on the geological evidence that helps explain how and where they form and spotlighting famous examples, such as Yellowstone s Old Faithful.