Birds can (perhaps) see magnetic fields

[jandl100]

This is a bit amazing so I thought I'd share it.

https://www.sciencealert.com/birds-see-magnetic-fields-cryptochrome-cry4-photoreceptor

And it might look like this to them ...

https://www.sciencealert.com/images/2018-04/bird-vision.jpg

Wow.

[User211]

This topic could inspire a lot of tweets!:D