> At first, when zebrafish encounter a strong current, they will respond with a surge of effort, but if that doesn’t work, they will give up. This is judged by specialised cells in their brains, which scientists call “futility counters”. Zebrafish know to listen to these cues because it factors into their survival, but humans have learned to override them.

Rad.

https://www.theguardian.com/wellness/2026/sep/22/lindsay-crouse-quitting-book