Clausewitz had many aphorisms, of which the most famous is, "War is not merely a political act, but also a political instrument, a continuation of political relations, a carrying out of the same by other means," a working definition of war which has won wide acceptance..

Published in 1872, thirteen years after On the Origin of Species, The Expression of the Emotions in Man and Animals is devoted to documenting what Darwin believes is the genetically determined aspects of behavior. Together with The Descent of Man (1871), it sketches out Darwin's main thesis of human origins. Here he traces the animal origins of human characteristics such as pursing of the lips in concentration, tightening of the muscles around the...

It's time for a new look at a very old universe. In its mysteries, we are finding the secrets of our past and the key to our future. This is a history of how we know what we do about space. Fifty years have flown by since man first ventured into space.

"It's time to raise the dead. Moments after a devastating car accident kills his father, 17-year-old Hemingway Jones takes his body to Lifebank, the cryogenic preservation company where he interns. Hijacking the lab in a desperate attempt to reverse the natural order, Hemingway holds police and medics at bay as he works to revive his father. As dawn breaks, the heart monitor beeps, and his father slowly creeps back to life. Days later, Hemingway arrives...

Thuvia, Maid of Mars is a science fantasy novel by Edgar Rice Burroughs, the fourth of the Barsoom series. The principal characters are Carthoris (the son of John Carter of Mars) and Thuvia of Ptarth, each of whom appeared in the previous two novels. While typical in many ways of Burrough's Barsoom novels, it also includes some inventive elements. Carthoris is madly in love with Thuvia. This love was foreshadowed at the end of the previous novel....

"Six days ago, astronaut Mark Watney became one of the first people to walk on Mars. Now, he's sure he'll be the first person to die there. After a dust storm nearly kills him and forces his crew to evacuate while thinking him dead, Mark finds himself stranded and completely alone with no way to even signal Earth that he's alive--and even if he could get word out, his supplies would be gone long before a rescue could arrive. Chances are, though, he...

The ultimate tale of Earth's invasion, written by one of the fathers of the science fiction genre. They came from a depleted, dying planet. Their target: the riches of a moist, green Earth. With horrifyingly advanced machines of destruction, they began their inexorable conquest. The war for Earth seemed destined to be ... but was it?

Harnessing the technology from the latest CGI video game flight simulators this puts the viewers behind the cockpit pitted against enemy aircraft in some of modern history's greatest air battles.