intriguing. It has inspired the new science of molecular paleontology, which hopes, as David Grimaldi put it, to "shed light on evolutionary questions that morphology alone sometimes cannot answer."George Poinar believes that the definition of life must be re-evaluated in the light of amber-extracted DNA. If this DNA can ever be put into a living cell, perhaps DNA itself can be called alive. ...
under a scanning microscope.The information obtained in this way can tell how long teeth will last before they are shed and replaced 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 ...
동아사이언스
디라이브러리
DS스토어
팝콘플래닛
