The Lifeboat Foundation has a list of the top ten.

[11:30 AM update]

Artificial life in three to ten years?

Bedau said there are legitimate worries about creating life that could “run amok,” but there are ways of addressing it, and it will be a very long time before that is a problem.

“When these things are created, they’re going to be so weak, it’ll be a huge achievement if you can keep them alive for an hour in the lab,” he said. “But them getting out and taking over, never in our imagination could this happen.”

I hope that’s not attributable to a mere lack of imagination…