One Cosmic Question, Too Many Answers

"Generations of physicists since Albert Einstein have been hoping to discover so called Theory of Everything, which would tie together seemingly unrelated details of universe; during past 20 years hope of universal answer has been explored through string theory, which professes to unite various forces of nature in single mathematical framework; concept is akin to vibration created when applying tension to guitar string; group of Stanford University scientists, led by Dr Leonard Sussking, has generated cosmic landscape, in which energy mapped in 4-dimensional space time allows for mountain peaks of dark energy and valleys containing universes, some of which could be suitable for life; concept of cosmological constant and its predicted and eventual decay is outlined; drawing; photos; (L)"