Fisheye pictures6/22/2023 I was later able to find out that they, together with similar paired pictures of the Ivy Court and the Library Lawn, had been offered to the college in 2007 by Edward Hill, and I was amazed to find that he is only yards from where I at present live, and I have yet to visit his gallery. The pictures bore only a small indecipherable monogram. ![]() (With the peripheral vision of both eyes included, I have a slightly more than 180° field.) If the field of view were only 180 degrees, the upward-looking eye would see the upper parts of the buildings but not the lowest parts or any of the grass. The views are like those of a super-fisheye camera, taking in a bit more than a hemisphere. Here’s my crude cross-section of the upward view:įor the downward view, flip the blue outline. In both, the field of view is more than 90 degrees in radius (more than 180 degrees in diameter). In one, the center is the nadir, the point below you in the other, the view is straight up, to the zenith, or point overhead. The pictures are of the same space, looking down and up, vertically. The lawn, closely mown in the fashion of ancient colleges, is in fact square its corners are obtusified by the perspective. I could discern the great hall, the chapel, and other features. It took a little studying to be sure that the buildings are those surrounding the Old Court of the college. The first picture seems to be of a green lawn surrounded by buildings and then by sky the other, its converse, sky surrounded by buildings and then by grass. (We were able to stay for a couple of nights in this room because I was once a student at this college.) On another wall of the room I found a similarly curious picture: According to fossil records, they have been on Earth for more than 500 million years! The total number of living fish species-about 32,000- is greater than the total of all other vertebrate species (amphibians, reptiles, birds, and mammals) combined.In a room in Pembroke College, Cambridge, hangs a round picture in a square frame. Another is that fish are very old on the evolutionary scale. The animals in this group live in a variety of habitats ranging from coral reefs and kelp forests to rivers, streams, and the open ocean. ![]() One reason fish are so diverse is that 70 percent of the planet is covered in water. Others can find their prey and even navigate by detecting electrical charges. Many can detect motion in the water using a special row of scales with sensors known as the lateral line. Because water transmits sounds, disperses chemicals, and conducts electricity better than air, fish rely less on their vision and more on their hearing, taste, and smell. Some species, such as the weedy sea dragon, are so bizarre they seem almost unreal.įish have developed special senses, too. Whale sharks, the largest fish, give birth to live young and eat only tiny fish, squid, and plankton. Eels, by contrast, have worm-like bodies and exceedingly slimy skin. Fin fish like salmon have gills, are covered in scales, and reproduce by laying eggs. All fish share two traits: they live in water and they have a backbone-they are vertebrates.Īpart from these similarities, however, many of the species in this group differ markedly from one another.
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