Mario Livio — Mysteries of an Expanding Universe

The Hubble Space Telescope, which turns 25 this year, has brought the beauty of the cosmos into our lives. Mario Livio works with discoveries it makes possible, studying things like dark energy, extrasolar planets, and white dwarf stars. He's fascinated with the enduring mystery of mathematics, the language of science. He describes the cosmic puzzles that accompany our greatest scientific advances.