1994年,美国印第安纳大学的鲁道夫·拉夫和他的同事们决定用遗传学的方法来计算进化发生逆转的概率。
In 1994, Rudolf Raff and colleagues at Indiana University in the USA decided to use genetics to put a number on the probability of evolution going into reverse.
现在的遗传学研究表明,这些美国南部的火蚁并不是南美原产的那种,而是来自世界各地的生物入侵。
Now genetic studies show that the southern United States, not these native lands in South America, is the source of multiple new invasions around the globe.
但是研究大型食肉动物的遗传学家,美国国家癌症研究所的斯蒂芬·奥布莱恩,制定了拯救美洲豹的计划:他利用遗传学和数学计算美洲豹的命运。
But a geneticist who studies big carnivores, Stephen o 'brien of the National Cancer Institute, devised a plan to save the panthers: he combined genetics and math to calculate the panther's fate.
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