Making multiverses.

Discusses the idea that there are multiple universes that make up a "multiverse". Theories and research that suggest the existence of a multiverse that extends beyond visual reality; Scenarios showing what will happen if the universe expands too fast and if the universe does not expand fast enough; How physical constants and space and time values affect cosmic fate; The limitations of astronomical-technology and speed-of-light horizons; The logic in the inflation and eternal inflation theories, as well as the idea of "landscape" in string theory; Explanation for "dark energy" or vacuum energy and its relation to string-theory landscape; Outlook for using the anthropic principle for cosmological prediction; Views of Max Tegmark, Alan Guth, Alexander Vilenkin, and others. INSET: HOW TO SPEAK COSMOLOGY.