Great Danes stretch more than a meter from paw to shoulder and can easily weigh more than 90 kilograms. A Chihuahua fits snugly inside a purse. Domestic dog breeds are more varied in body size and shape -- not to mention coat color and fur length -- than any other land-based mammal. Yet, according to a new study, a mere two to six regions in doggy DNA account for most of this diversity.
A database of fossil mammals in the western U.S., covering the late Oligocene and the Miocene, and featuring interactive mapping interfaces, complete metadata, full data-download capabilities, and data outputs suitable for direct import into statistical programs. Also available are high-quality digital images and original diagnoses of many Miocene type specimens of fossil mammals.
A fun educational video clip showing chasing of a bacterium by a neutrophil and eventually consuming it by phagocytosis. Useful to entertain students during cellular diversity lab. Illustrates concepts like cell size deference between eukaryotic and prokaryotic cells, cellular diversity (i.e. white blood cell vs. red blood cells vs. bacterium) and bulk cellular transport by phagocytosis.
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