Weekend Edition Saturday
<iframe src="http://www.npr.org/player/embed/1555314/1555315" width="100%" height="290" frameborder="0" scrolling="no">
NPR's Scott Simon talks with David Grinspoon, author of Lonely Planets: The Natural Philosophy of Alien Life about the possibility of other forms of life elsewhere in the universe or maybe right here on Earth.
NPR thanks our sponsors
Become an NPR sponsor
Support The Programs You Love