The mystery behind how birds navigate might finally be solved: it's not the iron in their beaks providing a magnetic compass, but a protein in their eyes that lets them "see" Earth's magnetic fields.
These findings come courtesy of two papers - one studying robins, the other zebra finches.
The fancy eye protein is called Cry4, and it's part of a class of proteins called cryptochromes - photoreceptors sensitive to blue light, found in both plants and animals. These proteins play a role in regulating circadian rhythms.
(Score: 0) by Anonymous Coward on Monday September 03 2018, @04:08PM
> Magnetic fields do not emit photons passively.
Um.
https://en.wikipedia.org/wiki/Electromagnetic_field [wikipedia.org]