Animosity between the genetically engineered Elites and their human subjects is fierce, and many rebels fight back against Elite rule. Hays Baker is a high-ranking agent in the Elite forces and at the forefront of keeping the humans under control. However, Hays is unknowingly hiding a secret that will make him the greatest threat to the Elite regime, and their number one target.

"From science fiction visionary Annalee Newitz comes The Terraformers, a sweeping, uplifting, and illuminating exploration of the future. Destry's life is dedicated to terraforming Sask-E. As part of the Environmental Rescue Team, she cares for the planet and its burgeoning eco-systems as her parents and their parents did before her. But the bright, clean future they're building comes under threat when Destry discovers a city full of people that shouldn't...

When Max and the Flock discover an unscrupulous scientist who is experimenting on humans in an effort to "improve" the human race, they decide that they must try to stop him, in spite of Angel's prediction about Fang dying.

Build your model ballista. Then construct two other types of catapult - the onager and trebuchet - designed such that they store the same amount of energy as your ballista. Field test all three to determine which throws a golf ball farthest. Will the winner be the weapon from the Hellenistic (ballista), late Roman (onager), or medieval era (trebuchet)? You may be surprised!

Now consider the water that you want in your house—for drinking, cooking, and bathing. Examine the technologies that collect water from a watershed and transport it to a municipality. Explore different designs for dams, and marvel at the Catskill Aqueduct that carries fresh water to New York City..

Trace the path of mechanical power from pistons to the engine crankshaft, then through the flywheel and clutch assembly to the transmission gearbox. Focus on the relationships between torque, rotational speed, and power, discovering the reason that transmissions require multiple gear ratios..

Elegant and efficient, the suspension bridge is your next DIY effort. Span the same small stream as in the previous project, but support the deck with suspension cables draped between two 5-foot-tall towers. Analyze the flow of forces through the structural system before designing each element. A 3D computer model helps you plan this impressive project.

Complete your model plane by assembling a rubber motor that will serve as a source of power. Design, carve, and install an efficient propeller. Learn how to balance your aircraft and adjust its flight characteristics. Then find a large, open field, and try a few test glides to fine-tune the plane's performance. Finally, watch it take wing on a full-power flight.

Why is cell phone service sometimes so unpredictable? Get inside the cellular network to learn how clever engineering makes a surprisingly large number of two-way conversations possible over a very narrow broadcast spectrum. Also see how the system leads to dead spots, dropped calls, and other familiar cell phone hassles..