That is my best interpretation of the following story from an organization that gave us the arsenic paper (A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus).
NASA’s top scientist predicts that we’ll find signs of alien life by 2025, with even stronger evidence for extraterrestrials in the years that follow.
“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 during a panel event on water in the universe.
“We know where to look. We know how to look,” Stofan added. “In most cases we have the technology, and we’re on a path to implementing it. And so I think we’re definitely on the road.”
Others at the panel agreed.