Word: antarctica
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Dates: during 1970-1979
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...doubt that he will find a way. Now 39, he has spent more than a decade getting this far, and obstacles have not fazed him. He was a doctor before he was a missionary, but while serving in the U.S. Navy Medical Corps on a 1960 scientific mission to Antarctica, he first saw his future during stopovers in Chile and Peru. "I was amazed and appalled at the misery of the poor," he says. "I had never seen anything like...
...home and caught a stunning view of the earth, with the side visible to the astronauts completely illuminated. In crystal-clear detail it shows almost the entire coastline of Africa and the offshore island republic of Malagasy, the Arabian peninsula and an unusually thick cover of swirling clouds over Antarctica and the surrounding region at the bottom of the world...
...past three months, a strange moth-shaped satellite has been orbiting the earth in a nearly perfect polar orbit some 560 miles high. Sweeping down from the Arctic to Antarctica and back again every 103 minutes, the 1,965-lb. spacecraft has been taking as many as 752 pictures of the earth every day; each shot covers a 115-by-115-mile square. Unlike U.S. and Soviet spy satellites, which are on the lookout for military sites, the mission of NASA's first Earth Resources Technology Satellite (ERTS-1) is purely scientific. A direct spin-off of the space...
...Jensen found the tooth of a long-extinct, snub-nosed little reptile called Lystrosaurus, which lived in Asia and Africa 200 million years ago. Its discovery in Antarctica provided convincing evidence that the continents were once linked together...
Fired to an altitude of 492 nautical miles, the satellite is expected to operate for a year in a near-polar orbit that runs almost parallel to the earth's axis of rotation. Sweeping down from high above the Arctic Circle to Antarctica, it will then head back north every 103 minutes. This orbit has an important advantage: it will bring the spacecraft back over the same spot on earth every 18 days at almost exactly the same time of day. Thus, ERTS's photographs, each covering a 100-by-100-mile square, will be taken at each...