Posts Tagged ‘mammal’

  • How do fish gills work?

    Gills are the equivalent of a mammal’s lungs, says Jeffrey Malison, director of the aquaculture program at University of Wisconsin-Madison. “Their primary purpose is to exchange gases, take oxygen in and release carbon dioxide out of the fish.”
    Both lungs and gills have a bed of very small blood vessels with thin walls that the gases [...]


    Thursday, April 26th, 2007
  • Biodiversity: Species Form Faster Near Poles

    Conventional wisdom says species form faster in the biodiverse tropics. But a new study shows fast speciation and extinction at the poles. Why didn’t we think up this study?


    Thursday, March 15th, 2007
  • Mouse Evolution: Making the Urban Mouse

    A new study reveals rapid evolution of white-footed mice in Chicago, in just 150 years.


    Thursday, May 29th, 2003


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