Theory of known American theoretical physicist Alan Harvey Guth of the inflationary universe modifies the scientific Big Bang theory, describing the origin of all space, time, matter, and energy, 13.7 billion years ago, from the violent expansion of a singular point of extremely high density and temperature.

This cosmologist researched early applicability of elementary particles. He, served as Victor Weisskopf professor of Physics at the Massachusetts Institute of Technology.

He graduated from Massachusetts Institute of Technology in 1968 and stayed to receive a master's and a doctorate also.

This junior particle physicist first developed the cosmic idea in 1979 at Cornell and gave his first seminar on the subject in January 1980. Moving to Stanford University, Guth formally proposed in 1981 that the a positive vacuum energy density (negative pressure) drove a phase of exponential expansion through which nascent universe passed. The results of the Wilkinson Microwave Anisotropy Probe in 2006 made the very compelling cosmic case. Measurements by the Background Imaging of Cosmic Extragalactic Polarization and Keck array telescope give support to the cosmic idea, on 17 March 2014, the findings of the B-mode polarization signature gave confirmation.

In the past, Guth studied lattice gauge theory, magnetic monopoles and instantons, Gott time machines, and a number of other topics in theoretical physics. Much of current work includes extrapolating density fluctuations, arising from various versions of inflation, to test against observations and investigating inflation in "brane world" models.

So far, he wrote sixty technical papers, related to the effects and interactions with particle physics. He won many awards and medals, including the medal of the international center for theoretical physics, Trieste, Italy, with Andrei Linde and Paul Steinhardt and the Eddington medal in 1996, and the British Institute of Physics awarded the Isaac Newton medal of 2009.

The Boston Globe organized the award for the messiest office in 2005. Colleagues, who expected the award to shame Guth into tidying his office, entered him, who quite proudly won the award.

In July 2012, he was an inaugural awardee of the fundamental physics prize, the creation of physicist and internet entrepreneur, Yuri Milner.

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