The military is known for its big, powerful, and complex machinery. This book, however, lays out a number of examples, modern and historic, of how the armed forces use simple machines. A compelling presentation of physical science curriculum points.

The military is known for its big, powerful, and complex machinery. This book, however, lays out a number of examples, modern and historic, of how the armed forces use simple machines. A compelling presentation of physical science curriculum points.

Everythingyou need to know about how machines...

Young learners will explore what a screw is and how it is useful.

Winner of the 2019 William E. Colby Award "The book I had been waiting for. I can't recommend it highly enough." —Bill Gates The era of autonomous weapons has arrived. Today around the globe, at least thirty nations have weapons that can search for and destroy enemy targets all on their own. Paul Scharre, a leading expert in next-generation warfare, describes these and other high tech weapons systems—from Israel’s Harpy drone to the American submarine-hunting robot ship Sea Hunter—and examines the legal and ethical issues surrounding their use. “A smart primer to what’s to come in warfare” (Bruce Schneier), Army of None engages military history, global policy, and cutting-edge science to explore the implications of giving weapons the freedom to make life and death decisions. A former soldier himself, Scharre argues that we must embrace technology where it can make war more precise and humane, but when the choice is life or death, there is no replacement for the human heart.

Pressing Down explores the benefits and uses of the lever. RobbO and RobbEE learn how a lever can be formed in three different ways to do different kinds of work--lift and lower, separate, and open.

The author aims to show how the emergence of intelligent and autonomous bombs and missiles equipped with artificial perception and decision-making capabilities represents a profound historical shift in the relation of human beings both to machines and to information.