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These Ants Don’t Follow the Sun

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Caren B. Les, Associate News Editor

Desert ants (Cataglyphis fortis) don’t necessarily look to the sun for directional cues. To find their way, they typically navigate by the global pattern of polarized skylight, a property of light normally invisible to the human eye. Although it has been known that ants, as well as bees, have used polarized skylight as a compass cue, it was thought that they used it only as a backup to sunlight, as on a cloudy day. Experiments conducted in plains near Maharès, Tunisia, by Rüdiger Wehner and Martin Müller, scientists at the University of Zürich in Switzerland, have...Read full article

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    Published: September 2006
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