Mixing it up

Article Abstract:

One chemical alone may not do harm in low doses, however, in conjunction with a few others, even in doses that are individually safe, it can inflict serious harm. New research in frogs shows that a mixture of nine chemicals found in a seed-corn field in York County, Nebraska, killed a third of exposed tadpoles and lengthened time to metamorphosis by more than two weeks for the survivors.

Nebraska, Health aspects, Frogs, Metamorphosis, Metamorphosis (Biology), Dose-response relationship (Biochemistry), Dose-response relationship

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Original mystery: Bt pesticide may not really be an insect killer

Article Abstract:

The toxic crystal produced by Bacillus thuringiensis (Bt) is widely used as a pesticide for preventing crop pests. A study suggests that Bt works in conjunction with gut bacteria, perhaps to produce septicemia, but the exact mechanism remains unknown.

United States, Prevention, Bacillus thuringiensis, Agricultural pests

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The trouble with men

Article Abstract:

Virpi Lummaa, a biologist describes the influences of evolution on human reproduction.

Finland, Research and Development in the Physical, Engineering, and Life Sciences, Biologists, Human evolution, Human reproduction, Lummaa, Virpi

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