At a party last year, I posed this question to a rocket scientist from the Rochester Institute of Technology. (He's a physicist with a specialty in rocket technology.) His response was, “I'd be surprised to learn someone's discovered a real fuel alternative to gas and oil. That would truly stun me.”
What news would surprise you?
I'd be surprised to hear we'd been contacted by aliens. Surprised, but not stunned. Carl Sagan imagined such an event in his fantastic novel, Contact.
On a more trivial scale, I saw or heard two things on my recent trip to New York City that surprised me.