the sun. This exploitation of people resulted in this same aristocracy looking down on anyone with darker skin.Such prejudice is ironic, for there is only one biological advantage of light skin. In the cloudy north, where the sun is up for fewer hours in winter, light skin manufactures vitamin D with minimal exposure to the sun. But with vitamin D readily available in milk or in capsules, no ...
Germany and the United States failed to detect the N-rays and there were occasional recriminations based on national prejudice on both sides. An American physicist, Robert W. Wood, visited Blondlot's laboratory and was shown the procedures. Wood secretly pocketed an essential portion of the detecting device, but the experimenters innocently proceeded to detect the N-rays anyway.Once Wood ...
동아사이언스
디라이브러리
DS스토어
팝콘플래닛
