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This is Scientific American's 60-second science. I'm Christopher in Taliatta.

GPS has completely transformed how we get around,

but other animals have long had their navigation systems built right in,

like ants and bees.

We know that their eyes are quite sensitive to polarized light,

and the sky has a particular pattern of polarized light relative to the

position of the sun. Barbara Webb, a bi-roboticist at the University of Edinburgh.

You can see polarized light firsthand. Take a pair of polarized sunglasses and rotate them against

the sky, and the light passing through the lenses changes.

Webb says the insects have polarization like that built right into facets of their compound eyes.

You can think of it as the equivalent of having a little polarization directional filter over them,

or lots of sunglasses pointing in different directions.

But Webb was curious whether there's really enough information in the sky to give insects a highly accurate sense of direction. So her team built a sensor, modeled after a desert

ant eye, and put it under artificial light meant to simulate the sky. They then fed that sensor

input into a computational model, meant to mimic the brains of desert ants, crickets, and other insects

with a celestial compass. And they found that with the insects innate sensing and processing

equipment, they can likely sense compass direction down to just a couple degrees of error. The results

...