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Birds may see magnetic field with help of eye protein

Swedish researchers have found evidence that a special molecule is the key to zebrafinches’ ability to use magnetism to help them navigate. Jeff Glorfeld reports.

Line of sight: a protein in zebrafinches’ eyes may be responsible for their ability to use the Earth’s magnetic field for navigation.
Line of sight: a protein in zebrafinches’ eyes may be responsible for their ability to use the Earth’s magnetic field for navigation.