Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..aprr15005t&link_type=abstract
American Physical Society, April Meeting, 2003, April 5-8, 2003 Philadelphia, Pennsylvania, MEETING ID: APR03, abstract #R15.005
Physics
Scientific paper
Deep and unexpected connections between the physics of the largest scales and of the smallest scales now link advances in understanding the birth and evolution of the Universe with those in understanding the basic laws that govern matter, space, time and energy. Three recent discoveries illustrate this point well: the composition of the universe -- quark-based matter (4%), neutrinos (between 0.1% and 5%), matter of a new kind (29%) and dark energy (67%); the presence of quark-based matter likely involves neutrinos; quantum fluctuations seeded the largest structures in the Universe. Ahead are great opportunities to deepen our understanding of both the Universe and the laws that govern it. They include identifying the dark matter particle and the nature of the mysterious dark energy; determining the neutrino masses and mixings and the roles neutrinos play in the evolution of the Universe; testing the limits of Einstein's theory of gravity; and determining how the Universe got started. Realizing these grand opportunities will require physicists and astronomers to work together using both telescopes and accelerators as well as creating new kinds of experiments. This is indeed a wonderful time to be a physicist!
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