You may have seen Mary Roach recently on “The Daily Show with Jon Stewart” talking about her book “Packing For Mars,” which apparently looks at some of the earthier aspects (pardon the pun) of space travel and the space program. Here’s a very entertaining audio interview with Roach from Jesse Thorn’s “Sound Of Young America” podcast. Listen all the way to the end if you’ve ever bought “astronaut ice cream” at your local science museum: