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Photograph of the retina of the eye. The optic disk appears yellow and the retinal arteries radiate
Pneumonia. This common lung inflammation may be caused by bacteria, viruses, or fungi and is often d
True-color image of layers of haze in Titan's atmosphere.
The Sun as it appears from the surface of the Earth at Sunset.
Adapoids and omomyoids had longer snouts and are the first “true” primates.
A commercial eyewash station. In a medical office, the eyewash station is likely to be attached to a