by new teeth. Plant-eating dinosaurs, who had to rip away at the hard grasses, had teeth that lasted only two or three months. Carnivorous dinosaurs, which, in general, ate softer food, had teeth that lasted as much as three years. Compare this with human teeth that may remain in the mouth and functioning for decades. (My teeth, at 71, are, for instance, in excellent shape, although they have ...
it happens, a gamma ray is produced that shouldn't be.Kekez and his group used the "Liquid Scintillation Detector" at Mont Blanc in the Alps. There they had 90 tons of liquid hydrogen which had been studied for six years for what nuclear events might take place. Any evidence of odd bits of radiation arising from violations of the exclusion principle would show up.The final decision came to ...
동아사이언스
디라이브러리
DS스토어
팝콘플래닛
