PhysOrg.com: Sharp-eyed robins can see magnetic fields

Sharp-eyed robins can see magnetic fields:

"a new study shows that [birds'] internal compass also depends on the birds having clear vision in their right eyes.

Cryptochrome also affects the light sensitivity of retinal cells, which suggests it may also affect sensitivity to magnetic fields. In effect, the magnetic fields create light or dark shadings over what the bird usually sees, and the shadings change as the bird turns its head, giving it a visual compass from the patterns of shading."

Wow.

The urge to quote Shakespeare is almost irresistible.

Via Engadget