Bush tuckervaries depending on the region, climate, and season. Kangaroo, emu, and possum are available all year round and are popular meat choices among the Aborigines. Other meats, such as lizards, frogs, and turtles, are most often enjoyed during the summer. Seafood is also a common meal...
Mitochondrial Eve and Y-chromosomal Adam—two individuals who passed down a portion of their genomes to the vast expanse of humanity—are known as our most recent common ancestors, or MRCAs. But many aspects of their existence, including when they lived, are shrouded in mystery. Now, a study...
While toned down RSV epidemics are in some ways a positive outcome, there will be more persistent occurrences of the virus throughout the year, Baker said. In short, infections will be spread out rather than be concentrated in certain seasons. That could leave people more vulnerable to the vi...
右图:青蛙的指芽细胞分裂生长形成指头。【参考M.J. Tyler,Australian Frogs: A Natural History(Sydney, Australia: Reed New Holland, 1999), p. 80.】 DNA 比较——可以有不同的解释 《科学美国人》反复重申一个普遍的论点-DNA的比较可以帮助科学家重建生物体的进化过程: “宏观进化研究生物分类学上物种水平...
【参考M.J. Tyler, Australian Frogs: A Natural History (Sydney, Australia: Reed New Holland, 1999), p. 80.】DNA 比较——可以有不同的解释《科学美国人》反复重申一个普遍的论点-DNA的比较可以帮助科学家重建生物体的进化过程:“宏观进化研究生物分类学上物种水平之上的变化,它经常以化石记录和DNA比较...