Massive, computer-analyzed geological database reveals chemistry of ancient ocean

Source: Science Daily

A study that used a new digital library and machine reading system to suck the factual marrow from millions of geologic publications dating back decades has unraveled a longstanding mystery of ancient life: Why did easy-to-see and once-common structures called stromatolites essentially cease forming over the long arc of earth history?

https://www.sciencedaily.com/releases/2017/03/170330142217.htm