I usually don't care very much about the QotD, but this is close to my heart so I will answer it.

Do you believe there is intelligent life on other planets?

Definitely.  I read this book when I was a small kid, and between that and other literature by Carl Sagan and Isaac Asimov I cannot help but be convinced by pure probability.

However, they may not be very close, as they seem to have not reached us just yet.  Or maybe they have, but are wiser than we are in their dealings with less advanced civilizations.