That outcome, with all of its momentous advantages for Eurasian societies, stemmed from three basic facts of mammalian geography, history, and biology.

这一结果及其对欧亚社会的所有重大优势，源于哺乳动物地理、历史和生物学的三个基本事实。

Geo- and astro-biologist Ken Nealson, find this desert area, so much like Mars, he comes here to try to better understand conditions on the red planet.

地理和天文生物学家Ken Nealson发这个沙漠地区如此像火星，他来到这里试图更好地了解这颗红色星球上的。

Now, as they report in this week's Nature, a group of palaeontologists have extended the known geographical range of early Homo sapiens from Africa to Europe.

，如他们本周《自然》期刊的报道，一群古生物学家将已知早期智的地理范围从非洲延伸至了欧洲。

In fact, National Geographic and GE's new series " Breakthrough" covers some cutting edge innovations that are happening, today, from biology and technology merging to solutions for our water crisis.

事实上，《国家地理》和通用电气的新系列节目《突破》涵盖了当今世界产生的一些前沿创新，从生物学和技术融合到我们水资源危机的解决方案。

Especially useful contributions have been made by ecological geographers, cultural anthropologists, biologists studying plant and animal domestication, and scholars concerned with the impact of infectious diseases on history.

生态地理学家、文化类学家、研究动植物驯化的生物学家以及关注传染病对历史影响的学者做出了特别有用的贡献。

Next, we're going to head to the Tropical Andes where biologists Ruthmerry Pillco Huarcaya is participating in the National Geographic and Rolex Perpetual Planet Amazon Expedition, researching one of the ecosystem's most iconic and endangered species.

接下来，我们将前往热带安第斯山脉，生物学家Ruthmerry Pillco Huarcaya参加国家地理和劳力士永久星球的亚马逊探险，研究这一生态系统中最具标志性且濒临灭绝的物种之一。