Marcelo Gleiser, Appleton Professor of Natural Philosophy at Dartmouth College, is a theoretical physicist who has worked on a diverse set of topics: cosmology, particle physics, phase transitions, condensed matter physics and biophysics.

an interesting take on the concept of reality and existence, notice the last statement: "In this case, and in a paradoxical way, the theories that we construct to amplify our view of physical reality will actually limit what we can know about nature."