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Tonight's moon will be full, so here is a timely question. Many unrelated animals tune their behavior by the lunar cycle. How do they do it, given that sunlight overpowers moonlight? Researchers in Austria think they have found a clue: a...
Credit: © Enrique Arboleda/Markus Hartl) Most organisms on earth depend on the energy from the sun. Sunlight is also an important coordinator of life's timers. Animals take important cues for proliferation, activity, feeding, or sleep from changing light conditions. These rhythms also exist in humans - as changing light conditions across the year can strongly impact human mood and psychology. Part of the natural light from the sun we are exposed to consists of ultraviolet (UVA and UVB) light, a short-wavelength part of the spectrum that is largely missing in artificial lighting. So far, most...