Martin Rees, "Life's Future in the Cosmos"

Cosmic Life

The pace of astronomic discovery, said the Astronomer Royal, keeps increasing with the constant improvement in our sensing technology. The recent discovery of the accelerating expansion of the universe (dark energy) revolutionized cosmology, and with the launch of the Kepler Telescope in 2009, we are beginning to detect and study Earth-sized planets around distant stars.

Since the Moon landings, humans in space have done little of scientific interest, but unmanned probes have...