Theoretical physics abounds with ideas about the past and future of the cosmos, the distant reaches of space, and the atoms at our fingertips. Dark matter, dark energy, extra dimensions and infinite universes only scratch the surface of the fantastical worlds that contain our little island of physics. Professor Caldwell will present a travelogue from the forefront of theoretical cosmology and its implications to observations and experiments. June 7, 7:30 p.m., Duane Physics G1B30.