Uncategorized
- Anthropology
Living Long in the Tooth: Grandparents may have rocked late Stone Age
A new analysis of fossil teeth indicates that the number of people surviving long enough to become grandparents dramatically increased about 30,000 years ago.
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The counterintuitive finding that atrazine is more likely to kill tadpoles when it is highly diluted reminds me of a similar phenomenon in the alternative health care practice of homeopathy. Tracy SellersRowlett, Texas
- Earth
Just a Tad Is Too Much: Less is worse for tadpoles exposed to chemicals
The herbicide atrazine is more likely to kill developing amphibians when it is highly diluted than when it's much more concentrated in aquatic environments.
