Scientists can now explain virtually every stage of the evolutionary process. But there’s a basic question that still mystifies even the best scientists: How did life first begin on Earth? Or to put in another way, how did non-life somehow turn into life? And can we say the Earth itself is alive? This hour explores some of the fundamental mysteries of life – from how it first started on Earth to the possibility of supremely intelligent life on other planets and why technology is evolving like life itself.

Original Air Date: November 21, 2010