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. "We know where to look. We know how to look," Stofan added during the event, which was webcast live. "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." Former astronaut John Grunsfeld, associate administrator for NASA's Science Mission Directorate, shared Stofan's optimism, predicting that signs of life will be found relatively soon both in our own solar system and beyond. Recent discoveries suggest that the solar system and broader Milky Way galaxy teem with environments that could support life as we know it.
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