Prof. Josh Frieman, Professor of Astrophysics at the University of Chicago

The evolution of the universe, expansion, accelerated expansion, the use, and misuse of the cosmological constant, dark energy, dark matter, the dark energy survey, and what could be in store for cosmology in the coming years.

Prof. Josh Frieman is Head of the Particle Physics Division at Fermilab, a Department of Energy national laboratory near Chicago that carries out fundamental research in high-energy physics. He is also Professor of Astronomy and Astrophysics in the Kavli Institute for Cosmological Physics at the University of Chicago and is currently President of the Aspen Center for Physics. He is a member of the American Academy of Arts and Sciences, an Honorary Fellow of the Royal Astronomical Society, a Fellow of the American Physical Society and of the American Association for the Advancement of Science.