Uncategorized
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19682
While I applaud the work that is looking at the biochemical correlates of aggressive and delinquent behavior, it is important to emphasize that environmental factors still predominate when we are searching for the roots of violence. Although there is no single factor underlying aggressive behavior in children, my own 30-plus years looking into the relationship […]
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- Humans
Letters from the May 20, 2006, issue of Science News
Forget dessert In “Got Data? Consuming calcium, dairy doesn’t keep off weight” (SN: 3/11/06, p. 147), you report, “Every 4 years, each volunteer completed a questionnaire about his body weight and dietary habits.” Any dieter knows that it is next to impossible to remember what one has eaten 4 days ago. Any more details on […]
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From the May 16, 1936, issue
Long-lived cicadas, zinc coatings for wire, and schizophrenia's cause.
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Darwin and Evolution
This online exhibit from the American Museum of Natural History is a fascinating account of how Charles Darwin developed his theory of evolution and how that theory is regarded today. The site includes a number of audio and video files and a link to a webcam that features a Galápagos tortoise. Go to: http://www.amnh.org/exhibitions/darwin/?src=e_f
- Humans
Indy’s Best: Young scientists cross the finish line
High school students from 47 countries gathered in Indianapolis last week to compete for scholarships and other prizes in the 2006 Intel International Science and Engineering Fair.
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Eye for Growth: New protein prompts optic nerve regrowth
A protein recently isolated from white blood cells could offer a new way to repair nerve cells damaged by injury or disease.
- Animals
Jay Watch: Birds get sneakier when spies lurk
A scrub jay storing food takes note of any other jay that watches it and later defends the hoard accordingly.
- Anthropology
Hybrid-Driven Evolution: Genomes show complexity of human-chimp split
A controversial new genetic comparison suggests that human and chimpanzee ancestors interbred for several million years before evolving into reproductively separate species no more than 6.3 million years ago.
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19681
Unlike some, I find no problem with the idea of hybrids between ancestors of chimpanzees and humans. We have to assume that any speciation event will be protracted. The collection of genes that separate humans from apes would hardly have arisen in a single individual. From my study of dabbling ducks, I have come to […]
- Materials Science
Feeling cagey
Researchers have discovered that gold can take the shape of nanoscale, hollow cages.
