Gender-biased bacteria throw off an evolutionary balance. Resource library : Evo in the news : Gender-biased bacteria throw off an evolutionary balanceApril 2011 Where's the evolution?
Why the eye is better than a camera. The human eye long ago solved a problem common to both digital and film cameras: how to get good contrast in an image while also capturing faint detail.
The illusion of a bright and dark band on either side of the central stripe is due to lateral inhibition, where the cones in the retina inhibit their neighbors using negative feedback. A UC Berkeley neurobiologist has discovered that the phenomenon involves localized positive feedback as well. (Courtesy of Wikipedia) Nearly 50 years ago, physiologists described the retina’s tricks for improving contrast and sharpening edges, but new experiments by University of California, Berkeley, neurobiologists show how the eye achieves this without sacrificing shadow detail. Kramer and former graduate student Skyler L.
Quick evolution leads to quiet crickets.