Wildlife Crossings (start time: 0:58) In this week’s show, host Susan Moran interviews journalist Ben Goldfarb about his new book, Crossings: How Road Ecology is Shaping the Future of Our Planet. It’s hard imagine modern human society without roads, be they interstate highways or county dirt roads. Love them or hate them, roads make our lives convenient. But for wild animals trying to migrate or find a mate, vehicle traffic on roads spells death. (And of course it kills people and their pets as well.) Twenty-one species of wildlife face extinction due to roads. Vehicles kill one million animals every day in the U.S. alone. Goldfarb’s book explores both the causes of and creative solutions to habitat fragmentation and direct killings of wildlife by roads and car traffic.
Host/Producer: Susan Moran
Engineer: Shannon Young
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On this week’s show journalist and author 
Conservation on the Edges (start time: 13:26) Charismatic predators like polar bears, grizzlies, and tigers, get lots of attention, and for good reason. But many lesser known species, particularly those living in extreme environments–including muskoxen, wild yaks, takins and saigas–are also important species. They have been the research focus of 
The Unnatural World (start time: 6:58): It’s an audacious topic for a book: the planet, and audacious individuals who are working to save — actually, to remake — human civilization and our home on Earth. 
The Science of Humor (start time: 14:32): Have you ever laughed at something you know you shouldn’t have? Like when someone you know falls down the stairs? 
The Universe Within (starts at 4:40) Within each and every one of us is the history of life on this planet, the planet itself and the entire universe. This is the theme of a new book “The Universe Within.” The author, Neil Shubin, is a professor of Paleontology and Evolutionary Biology at the University of Chicago. Starting with what physically constitutes a human being and what makes a human life possible, Shubin surveys many domains of science to find out what we can learn about what’s out there from what’s inside of us. It’s a fantastically broad scope, bringing together the common history of Rocks, Planets and People. As professor Shubin explains to How On Earth’s Chip Grandits, it is the very concept of this common history that binds all of these topics, which are normally found scattered throughout disparate domains of science and academia.
![Pluto and its moons [click to enlarge] (credit: NASA, ESA, M. Showalter, Z. Levay)](http://howonearthradio.org/wp-content/uploads/2011/08/hs-2011-23-d-web_print.jpg "hs-2011-23-d-web_print")
