返回 【科学60秒】人类远距离捕猎的秘密武器

听力简介:


“Stand up straight! And do something about that hair!” Annoying? Sure. But such ___1___ may have made humans what we are today. Because our upright stance, and relative lack of hair, may have enabled our human ancestors to run far and fast enough to capture their prey. So say scientists in the Journal of Human Evolution. [Graeme D. Ruxton and David M Wilkinson, "Thermo regulation and endurance running in extinct hominins: Wheeler’s models revisited"]

The idea that standing on two legs and ___2___ all that body hair might have helped early humans keep cool on the African savanna was first ___3___ in the late 1980s. But those early models had our ancestors standing still in a gentle breeze. Scientists simply didn’t have the computational power to assess what might happen when those early humans had to up and chase down a meal.

The new model ___4___ how hot a human would get running long and hard enough to outlast an animal galloping in the midday sun. And it shows that a hominin would have to have been as energetically efficient, and as hairless and sweaty, as we are today to ___5___. Homo erectus could probably have gone the distance, the scientists say. But Australopithicus probably didn’t have the legs.
【视听版科学小组荣誉出品】

开始听写:


已用时:00:00:00 取消 或 
Ctrl+Enter快捷提交
听写于:0001/1/1 0:00:00 用时:00:00
正确率:0% 错词:

保存中... 保存中...

请在登录后才能看到内容!

请在登录后才能看到内容!

本文暂未收录注解!

参与沪友(已有28人听写,点击头像查看Ta的听写详情)



提示:每次提交会覆盖之前的内容哦~