Thanks to powerful new technologies––and the good old inborn drive to explore––human beings are now investigating places once assumed to be inaccessible. We hear from an oceanographer pushing the limits of technology to explore bizarre “lakes” in the deepest recesses of our oceans; a planetary geologist using images from orbiting spacecraft to explore processes shaping the surfaces of planets, such as dunes migrating across the surface of Mars; and an astrophysicist trying to solve the mystery of the solar wind by building a probe that will fly right into the blazing atmosphere of our sun. Speakers: David Gallo, Maria Banks, Justin Kasper, Paula Apsell