Cyrptochromes

[Nachtfeuerzeug]

https://www.sciencealert.com/birds-have-a-quantum-sense-and-for-the-first-time-scientists-see-it-in-action

I'll have some time later to comment on this but I wanted to put this out. Interesting!

[JamesB]

There is a video somewhere on youtube of Jim Alkalili talking about this very subject