[iaw]

Light travels from one point to another in a direction.

Perpendicular to that direction light "wiggles" on it's way from origin to destination.

The direction of the 'wiggle' is the polarization of the light.

Unpolarized light wiggles in every direction while polarized light only wiggles in one.

Certain things (like how the sun shines on the sky) creates polarized light naturally.

The earth's magnetic field DOES NOT polarize light.

Birds have a protein in their eyes that uses blue light + the earths magnetic field to visualize the magnetic field around them.

Similar to visualizing the polarity of light, we lack the ability to visualize magnetic fields, making both foreign concepts.