Sleep is your superpower !

https://www.ted.com/talks/matt_walker_sleep_is_your_superpower/transcript

这个视频说了一段冷知识:
Men who sleep five hours a night have significantly smaller testicles than those who sleep seven hours or more.

每晚睡5个小时的男性睾丸明显小于睡7个小时或更长时间的睾丸。