Humans typically take about 25,000 breaths per day — often without a second thought. We talk with journalist James Nestor about how breath work can affect your overall health. His book is 'Breath: The New Science of a Lost Art.'Jazz critic Kevin Whitehead looks at what he calls the "stock jazz-movie ending," a basic plot element subject to many variations.When living things cross into new territory, they are often viewed as threats. But science writer Sonia Shah, who has written a new book — 'The Next Great Migration' — says the "invaders" are just following biology.