On September 10, 2025, NASA announced (again) that it had found potential evidence for life on Mars. A few people asked me about it, so I’m dusting off (and updating) this Quora post from March 2014 on the subject. First, let’s discuss the most recent find, from a rock outcrop investigated by Perseverance in July 2024, last year. Speculation about this data, which is uploaded daily, has been rife in the community. Now the paper in Nature outlines the extraordinary efforts taken by the Mar...
