Some unicellular bacteria are able to see by acting as a microscopic lens of a camera that focuses light. This conclusion was reached by scientists from the University of Freiburg (Germany) and the University of Queen Mary (London), headed by Konrad Muline.
The object of their study was cyanobacteria, which form green mucus on coastal rocks. It has long been known that they move both towards the light and away from it. Moreover, their process of photosynthesis proceeds in the same way as in other plants.
Konrad Muline's team worked on bacteria with a laser to determine their sensitivity to light. Lacking light, they start looking for it to support life. According to scientists, spherical cyanobacteria are probably the smallest and oldest single-celled "camera-eye". They can also focus on an object, just like the human eye, with the only difference that the image is somewhat blurry.
Muline admitted that for him and his team, the research results were a real revelation:
"No one before us noticed this before, although people have been observing bacteria for 340 years."