奇怪的两脚兽｜为什么我们会说话

这些变化重新塑造了我们的喉部，将喉咙进一步向下移，我们颈部开始变长的原因也就是因为我们的舌头向下移动，喉部拉低，需要更多颈部空间容纳⬇️⬇️。

会手语的koko：

鸟的鸣管：

封面： Martha Rich

片尾曲：万晓利-鸟语 (LIVE@鐵花村 2012.02.17.) 
片头曲/BGM：B minor, Probably 编曲：兔子博士

参考：

From Grunting To Gabbing: Why Humans Can Talk

https://www.npr.org/templates/story/story.php?storyId=129083762

It only takes a few gene tweaks to make a human voice

https://www.newscientist.com/article/2145475-it-only-takes-a-few-gene-tweaks-to-make-a-human-voice/#ixzz7F9U9DMYU

Koko The Gorilla Probably Doesn't Understand Climate Change

https://www.huffpost.com/entry/koko-gorilla-climate-change-video_n_568d2368e4b0cad15e62bbf1

Signing, Singing, Speaking: How Language Evolved

https://www.npr.org/templates/story/story.php?storyId=129155123

Talk, Talk, Talk: One Thing We Do Better than Apes

https://www.livescience.com/1688-talk-talk-talk-apes.html

Why parrots can talk like humans

https://www.vox.com/videos/2019/3/4/18245163/parrots-humans-speech

“语言基因”FOXP2跌下神坛

https://neu-reality.com/2018/08/foxp2-language-gene-dethroned/