Credible prediction - positive signs of alien life found within ten years.
http://www.livescience.com/50421-alien-life-evidence-by-2025-nasa.html
"Humanity is on the verge of discovering alien life, high-ranking NASA scientists say.
"I think we're going to have strong indications of life beyond Earth within a decade, and I think we're going to have definitive evidence within 20 to 30 years," NASA chief scientist Ellen Stofan said Tuesday (April 7) during a panel discussion that focused on the space agency's efforts to search for habitable worlds and alien life."