Even the Hadza people, hunter-gatherers in Tanzania, show something like it.

甚至坦桑尼亚的狩猎采集者哈扎人也表现出类似的情况。

The most enchanting involves the symbiosis between the Hadza and a feathered collaborator, which evolved over thousands of years.

其中最吸引人的是哈扎族人和一只长着羽毛的合作者之间的共生关系，这种共生关系已经进化了数千年。

Researchers evaluated the Hadza, a group of people in Tanzania who live a traditional hunter gatherer lifestyle.

研究人员评估了哈扎人，这是坦桑尼亚的一群人，他们过着传统的狩猎采集生活方式。

An example of a hunter-gatherer society is the Hadza people of Tanzania.

狩猎采集社会的一个例子是坦桑尼亚的哈扎人。

A lot of plants, Dr. Ponsor has worked closely with the Hadza, a group of them in Tanzania.

很多植物，Ponsor博士与坦桑尼亚的哈扎人密切合作。

They went out into the middle of the Savannah in Tanzania to measure the energy burn among a group of hunter gathers called the Hadza.

他们去到坦尚尼亚大草原的正中央，计算一群被称作 Hadza 的採猎者的能量消耗。

The Hadza of Tanzania are often interesting to look at as their lifestyle is thought to be similar to that of prehistoric humans.

坦桑尼亚的哈扎人往往看起来很有趣，因为他们的生活方式被认为与史前人类相似。

And the Hadza, they don't have any domesticated animals or plants or machines or guns or electricity or plumbing or anything like that.

哈德扎人，他们没有任何家养的动物或植物或机器或枪支或电力或管道之类的东西。

We went to work with a Hadza community in northern Tanzania, they're one of the few traditional hunting and gathering communities left in the world.

我们去了坦桑尼亚北部的一个哈扎部落工作，他们是世界上仅存的几个传统狩猎和采集部落之一。

For example, it was recently discovered that Hadza people of northern Tanzania who are isolated from modern culture don't exhibit the endowment effect.

例如，最近发现与现代文化隔绝的坦桑尼亚北部哈扎人并没有表现出禀赋效应。

And the Hadza – they don't have any domesticated animals or plants or machines or guns or electricity or plumbing or anything like that.

还有哈扎人— — 他们没有任何驯养的动物、 植物、机器、 枪支、 电力、 管道或类似的东西。

So even though the Hadza have a much more physically active lifestyle, they weren't burning any more calories every day than adults in the US and Europe.

所以儘管 Hadza 採猎者们过著较为活跃的生活，他们每天并没有比住在美国和欧洲的成年人燃烧更多的卡路里。

I couldn't find studies specifically on their sleeping position, but this brief video talking about a study on the Hadza's sleep patterns shows most of them sleeping...on their side.

我找不到专门关注他们睡眠姿势的研究，但这段有关哈扎人睡眠习惯的研究的短视频显示他们大部分会… … 侧卧睡眠。

The Hadza men and women out there getting more activity every day than you get in a week, had the same energy expenditure, per day, as sedentary Americans and Europeans.

哈德扎人每天的活动量比你一周的活动量还多，他们每天的能量消耗和久坐的美国人和欧洲人一样。