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In this article, what, other than hubris, allows the modelers to conclude that the assumptions upon which their calculations are based are more valid than those upon which the genetic and paleontological calculations are based? Letting a computer do the number manipulations doesn’t change “garbage in, garbage out.” Leonard StoloffDelray Beach, Fla.
- Paleontology
Older Ancestors: Primate origins age in new analysis
A controversial new statistical model concludes that the common ancestor of primates lived 81.5 million years ago, about 16 million years earlier than many paleontologists have estimated.
- Earth
Feminized Frogs: Herbicide disrupts sexual growth
At concentrations currently found in water, the widely used weed killer atrazine hormonally strips male frogs of their masculinity and may be partly responsible for global amphibian declines.
