Guest: Jonathan P. Gardner, Ph.D.

This hour on Focus, we're joined by NASA astronomer and cosmologist Jonathan Gardner to discuss his work on the James Webb Space Telescope.

Guest: Stephen J. Pyne, Ph.D.

Within the next few years, we may see one of the Voyager spacecraft become the first man-made object to exit our solar system. It's the pinnacle of how far the human drive to explore can take us. Today on Focus, we're joined by Stephen Pyne, author of Voyager: Seeking Newer Worlds in the Third Age of Discovery. He'll talk about the great explorers, their motives, and their rewards, from the Renaissance to the modern age.