+ NOVA | Evolution in Your Life. Featuring Pam Ronald. PBS

When you hear the word evolution, you may think of iconic images of Darwin and the Beagle, representations of the "tree of life," pictures of apes and the DNA double helix. But do you realize just how thoroughly the subject seeps into our everyday lives? To give a sense of this, we asked five experts in different fields to briefly describe an example. Listen in, and find out how evolution and the process of natural selection–the survival of those creatures that are best adapted to their environment–gives us dogs, makes us such good runners, and even helps us solve crimes. Click here for more.