Not intelligent life, not in my life time, but, assuming infinite universe, it's out there somewhere. But microbial life, I'd not bet against finding evidence for it in the next 50 years. We know that some Earth microbes can survive in even vacuums for at least short periods, as well is in our own atmosphere. Ellen Stofan (chief scientist at NASA) reckons we'll have strong indications within a decade, and evidence within 20 or 30 years. There's self-interest there in terms of funding further exploration, but the science types I know and chat with are all believers in something to be found in the Solar System.