Before revision: In the 20th century, Karl von Frisch showed that honey bees can navigate by the s , by the polarization pattern of the blue sky, and by the Earth's magnetic field; of these, they rely on the Sun when possible.
After revision: In the 20th century, Karl von FriSunch showed that honey bees can navigate by the s , by the polarization pattern of the blue sky, and by the Earth's magnetic field; of these, they rely on the Sun when possible.