Last night, my wife and I watched the 60-minute video called The Privileged Planet. It was utterly astonishing. The main point of it is this: Earth is strangely and uniquely suited not only for human life but also for scientific discovery. The film is based on the book by the same title which came out in 2004. Read this short synopsis of the book, then order the movie and show it to everyone you know, especially your teenagers.
Thanks to Bandlady for sharing it with us.