Early humans seem to have played a major role in finishing offnine other mammal species that weighed over a tonne.
早期人类似乎扮演了终结者的角色，使其他九种超过一吨的哺乳动物彻底从地球上消失。
The early humans also found a practical use for their discovery, such as storing things like grain—although there were drawbacks.
早期人类也找到了他们的发现的实际用途，比如储存像谷物这样的东西——尽管还有一些缺点。
If early humans hadn't moved and intermingled as much as they did, they probably would have continued to evolve into different species.
如果早期人类没有像以前那样频繁地移动和融合，他们可能会继续进化成不同的物种。
However, when early humans first began to reflect on the nature of things around them, they discovered that they needed an idea of number simply to keep their thoughts in order.
然而，当早期的人类第一次开始反思周围事物的本质，他们发现只是为了让思维保持有序也需要有数字的概念。
From earliest childhood, we are so bound up with our system of numeration that it is a feat of imagination to consider the problems faced by early humans, who had not yet developed this facility.
从幼年初期时起，我们就与我们的计数系统紧密联系在一起，以至于考虑未开发计数能力的早期人类所面临的那些问题，就已经成为了想象力上的一次壮举。
Early humans also noted changes in the moon.
早期人们也记录了月亮的变化。
It seems likely that early humans did much the same thing.
看来早期人类也差不多是这样。
So why did early humans leave home without a better toolkit?
那么，为什么人类离开古老的家园却不携带更好的工具包呢？
The next day, the stone looked like ones used by early humans.
第二天，这些石头看起来就像早期人类所用过的石头了。
Tool-use no doubt helped early humans in butchering their dinners.
工具的使用无疑能够帮助早期人类捕杀并食用猎物。
Were early humans subjected to selection pressures to keep them honest?
是早期人类受到选择压力使他们诚实吗？
Nature 1, gives researchers unprecedented insight into the movements and make-up of early humans.
今天在《自然》杂志上所发表的这个古爱斯基摩人的基因序列为研究者提供了前所未有的机会，让他们能够洞察早期人类的行动与妆容。
"Some early humans were making stone tools and they were bad at it and so they quit," Williams says.
“一些制作石器的早期人类，发现自己技不如人，于是他们就放弃了，”威廉姆斯说。
And the payoff would've been big for early humans: lots of high-calorie meat to feed a bigger brain.
早期人类的收益是很大的：很多高热量的肉类，供养更大的大脑。
This theory dictates that the factors which made early humans satisfied are still true with modern life.
该理论认为，那些令早期人类感到满足的因素，在现代生活中依然发挥着作用。
When early humans started drawing on the walls of caves, they created a lasting record of things that mattered.
从早期的人类在岩穴的墙壁上绘画起，人们就开始持续记录重要事件。
Climate change, hunting by early humans, and even a meteorite are among theories for their abrupt disappearance.
有3种理论解释它们的突然灭绝：气候变化、原始人狩猎、陨星。
Early humans: Middle Awash Aramis, Ethiopia, where the first 'modern' human beings were thought to have been discovered.
早期人类：之前人们一直认为第一个现代人类是在阿瓦士阿拉米斯中部埃塞俄比亚被发现的。
The early humans may have applied the concoction to their skin for protection or simply decoration, experts suggested.
专家们建议，早期的人类可能已经运用这种调和物来保护皮肤或做简单的装饰。
Their estimate of 18,500 individuals is pretty sparse considering that these early humans were spread across the Old World.
考虑到这些早期人类遍布于整个旧世界，科学家们估计的18 500的人口数量是相当稀少的了。
Their estimate of 18, 500 individuals is pretty sparse considering that these early humans were spread across the Old World.
科学家们估计人口数量在18500左右，考虑到我们的祖先散布在世界各地，这个数字说明人类在当时是相当稀有的。
Scientists wondered whether others could have placed dead bodies there in a kind of behavior rarely found in early humans.
科学家们想知道是不是其他人将遗体放置于此，在早期人类中很少发现这种行为。
Just as raising temperature can change the properties of iron and other metals, early humans heated stone to make it easier to flake.
正如给铁和其他金属加温以改变其属性，早期人类通过给石头加温，使之更容易被制作成石片。
And the presence of this paint-production laboratory indicates that the early humans knew basic chemistry and could plan for the future.
这间颜料制作工作室的存在表明，早期人类就懂得基本的化学知识并有能力规划未来。
Early humans may have taken a detour into Eurasia before embarking on their epic journey out of Africa, according to new fossil evidence.
据最新发现的化石证据表明，早期人类可能在踏上走出非洲的史诗性旅程之前，早已先绕道进入过欧亚大陆。
The finding offers new insight on how early humans ran and raises concerns that sports shoes may promote more injuries than they prevent.
这项研究提供了一种深入研究早年人类是如何奔跑的方式，也引起人们对跑鞋在未来可能带来更多损伤的重视。
People love to get their hands on the latest and greatest technology, and scientists had long believed that early humans were no exception.
人们总喜欢把最新的和最伟大的技术弄到手中，长期以来，科学家们都相信早期的人类也不例外。
Jones [the researcher] speculates that this ability to perceive things about attractive people faster may have been useful to early humans.
研究员琼斯(Jones)猜测，这种更快察觉魅力人士的能力可能对早期人类很有用。
Jones [the researcher] speculates that this ability to perceive things about attractive people faster may have been useful to early humans.
研究员琼斯(Jones)猜测，这种更快察觉魅力人士的能力可能对早期人类很有用。
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