STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Mosquito head. Coloured scanning electron micrograph (SEM) of the head of a mosquito, showing its large compound eyes. Each eye consists of many lenses (spheres) known as ommatidia. Each ommatidium is a simple eye that sends a signal to the mosquito's brain. The brain combines the thousands of images to form a mosaic view of the world. The image produced is not sharp but is excellent at detecting movement. Magnification: x100 when printed at 10 centimetres wide.
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