National Geographic : 1983 Jun
Squeeze and heat all the matter in the cosmos to the nth degree, and physicists have derived a standardmodel of the universe just after the big bang. But this model unrefined is flawed-for, run forward in time, it predicts creationof supermassive particles that would force the universe to collapseon itself at the tender age of 30,000 years. To address such problems, MIT theoristAlan Guth (above) and others conceive an "inflationaryuniverse" that, in a sudden surge of expansion, suppresses creation of massive particles and smoothes out lumps of excess density. Thereafter, when the universe is between a few minutes and a million years old, it evolves into a mass of particles,computer simulated (below) by S. Djorgovski, University of Californiaat Berkeley. Lines enclose regions of equal density where seedlike cores grow to the scales of galaxies or clusters of galaxies.