Update:Not looking good.

“Our failure to detect intelligent extraterrestrials may indicate not so much how rarely these have evolved, but rather how rapidly they have destroyed themselves after developing technological civilizations.”

“What is surprising is that so little has been done to develop Earth-based artificial biospheres… If one-hundredth as much had been spent on developing artificial biospheres as on making nuclear weapons, a lengthy future for humankind might by now be virtually assured.”