Today, a fresh crop of true believers, including brilliant scientists, view death itself as a problem to be solved. Are they fantasizing? What are the prospects and problems and unforeseen side effects of longer life spans?

Technology has given average humans far more health and wealth and freedom of action than ever. New gifts spill forth at an accelerating pace as the sheer amount that we know rockets beyond our ability to process. This acceleration has some pondering a looming singularity - an approaching time of transition, spurred in part by new kinds of artificial intelligence - that could make the year 2050 as strange to us as a cave dweller would find our modern cities. Are these extrapolations well based?

What may we become? How will we endure? The future is a daunting realm, filled with real and imagined perils. So enter it prepared! Here are vivid tales about possible tomorrows, from the keen eye and colorful pen of David Brin, a modern master of speculative fiction.

From Hugo- and Nebula-winning author David Brin comes this extraordinary collection of tales and essays about the near and distant future, as humans and other intelligences encounter the secrets of the cosmos - and of their own existence. What happens when an urban archaeologist discovers a terrible secret under the landfills of Los Angeles? Will there still be a purpose for "biologicals" when cybernetic humans become mighty and smart? Come explore these and another dozen startling and provocative tomorrows with a modern master of science fiction.

Prescient and scientifically accurate, Heart of the Comet is known as one of the great hard SF novels of the 1980s. First published in 1986, it tells the story of an ambitious manned mission to visit Halley's Comet, alter its orbit, and mine it for resources. But all too soon, native cells - that might once have brought life to Earth - begin colonizing the colonists. As factions battle over the comet's future - and that of Earth - only love, courage, and ingenuity can avert disaster and spark a new human destiny.