When does a story about science become science fiction? Cosmologist Lawrence Krauss and theoretical physicist Brian Greene discuss how to spin a yarn about string theory or the Big Bang, without hyping the science. And novelist Ian McEwan, whose books touch on neurosurgery and quantum field theory, talks about what science offers to fiction.
The Sonoran Desert, which spans some 100,000 square miles in southwestern North America, is one of the most diverse desert ecosystems in the world. Host Ira Flatow and guests discuss some lesser known desert creatures, and explore the secret life of that American southwest icon, the saguaro cactus.
How do you play a character who's been depicted more than nearly any other character in all of Western civilization?
That's the challenge currently facing Irish actress Fiona Shaw, who in the past has played such well-known fictional characters as Harry Potter's Petunia Dursley and Marnie Stonebrook on HBO's True Blood -- not to mention titanic classical roles from Euripides' Medea to Shakespeare's Richard II.