Round single cells may have been the first creatures to see Earth
After all those years of people looking into microscopes at bacteria, it turns out that some of the bacteria are (sort of) looking back.
Synechocystis bacteria focus light in a roughly eyeball-like process, says Conrad Mullineaux of Queen Mary University of London. Light shining through their spherical cells focuses on the opposite side, where light-sensitive substances react
– more @ sciencenews