I'm a science journalist and author, currently doing a Knight Science Journalism Fellowship at MIT. Along with my newspaper and magazine work, I've made more than a dozen radio documentaries for CBC Radio in Canada. I've written two popular science books, "In Search of Time" and "Universe on a T-Shirt." www.danfalk.ca / Twitter: @danfalk
Even if life itself is common in the universe, linguistic, symbol-using creatures like ourselves may be quite rare indeed. Could we be the only thinking creatures in the cosmos?