Ben Bova continues his hard SF Star Quest series which began with Death Wave and Apes and Angels. In Surivival, a human team sent to scout a few hundred lightyears in front of the death wave encounters a civilization far in advance of our own, a civilization of machine intelligences. These sentient, intelligent machines have existed for eons, and have survived earlier “death waves,” gamma ray bursts from the core of the galaxy. They are totally...

"Jamie Waterman discovered the cliff dwelling on Mars, and the fact that an intelligent race lived on the red planet sixty-five million years ago, only to be driven into extinction by the crash of a giant meteor. Now the exploration of Mars is itself under threat of extinction, as the ultraconservative New Morality movement gains control of the U.S. government and cuts off all funding for the Mars program. Meanwhile, Carter Carleton, an anthropologist...