Variations in skin color provide one of the best examples of evolution by natural selection acting on the human body and should be used to teach evolution in schools, according to a Penn State anthropologist.
Evolution
Feb 20, 2011
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People who remain pale and never tan can blame their distant ancestors for choosing to live in the northern reaches of the globe and those who easily achieve a deep tan can thank their ancestors for living in the subtropical ...
Other
Jun 21, 2010
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A new model for manipulating vitamin D levels in young calves has been developed by Agricultural Research Service (ARS) scientists who say it could help establish just how much of this important nutrient the young animals ...
Other
May 25, 2010
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(PhysOrg.com) -- A new study has found that Vitamin D, readily available in supplements or cod liver oil, can counter the effects of Crohn's disease. John White, an endocrinologist at the Research Institute of the McGill ...
Biochemistry
Jan 27, 2010
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Keeping warm isn't the only reason lizards and other cold-blooded critters bask in the sun. According to a study published in the May/June issue of Physiological and Biochemical Zoology, chameleons alter their sunbathing ...
Plants & Animals
Apr 20, 2009
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In a development that could help improve the prevention and treatment of osteoporosis, rickets, and other bone diseases, government chemists are reporting an advance in developing an accurate, reliable set of standards for ...
Analytical Chemistry
Mar 25, 2009
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