Guest: Bob Berman.

Without the sun, there would be no life on Earth. Today on Focus, we're joined by author Bob Berman to talk about his new book The Sun's Heartbeat. He provides a lively biography of our star, from its birth to its spectacular future death, and addresses some of the mysteries regarding the sun and sunlight. We'll tackle all this and more on the show.

Guest: Richard Cohen.

From mythology to medicine, the Sun is present everywhere in our world, not just in our sky. Today on Focus, author Richard Cohen joins the show to talk about his explorations of the human relationship with the star, armed with all kinds of interesting statistics, surprising myths, and extraordinary anecdotes.