Infinite in All Directions: Gifford Lectures Given at Aberdeen, Scotland, April-November 1985

American Anthropic Principle apparatus arms control artificial intelligence asteroid Astrochicken astronomers atoms Austrian Austrian State Treaty beginning biological black holes boost-phase defense cells century chemical comet showers computers craters creatures diversity dream Earth Eigen Einstein Emil Wiechert error catastrophe evolution existence experiments exploration future genes genetic engineering Germany happen hardware Hipparcos homeostasis HTGR human ice ponds idea imagine industry invented Japan laser launch lectures living look Manchester mathematical metabolism military missions modern molecular molecules Moon nature Nemesis non-nuclear nuclear weapons nuclear winter nucleic acids nucleotides observations Oort Cloud Oparin orbit origin physicists physics planet political possible Princeton problem protein questions reactor replication rocket Schrödinger scientific scientists Shuttle solar Soviet Union space science spacecraft species Star Wars strategic defense structure superstrings technical telescope theory things tion treaty unifiers universe Uranus Voyager X-ray