Tuesday, January 24, 2006

So I Lied (Catching up on my random linkblogging)

I need to clear out some tabs. So fast and furious, here we go:

HealthDay News via Yahoo: Antibiotic Resistance Widespread in Nature:

"The density of resistance is surprising," said Gerard D. Wright, chairman of biochemistry and biomedical sciences at the university's Michael G. DeGroote School of Medicine. "Old compounds, new compounds, it doesn't seem to matter. They have all sorts of ways to get around these things."

That resistance doesn't come from exposure to antibiotics used in medical treatment, Wright noted. It's just the bacteria's way of surviving in a world full of perils, he explained, since they are surrounded by competing organisms that produce their own natural antibiotics.


Science Blog: Indigenous Amazonians display core understanding of geometry:

"Although there has been a lot of research on spatial maps, navigation and sense of direction, there is very little work on the conceptual representations in geometry," says co-author Stanislas Dehaene of the Collège de France in Paris. "What is meant by 'point,' 'line,' 'parallel,' 'square' versus 'rectangle'? All are highly idealized concepts never met in physical reality. Our work is a first start in the exploration of these concepts."

The work by Dehaene and colleagues suggests that such concepts are largely universal across humans.


Article: Methadone And Morphine in Depression
(Just linked to remind myself to look into this more.)

Science Blog: How the brain makes a whole out of parts:

"Humans do a rough categorization of objects very quickly," Connor said. "For instance, in just a tenth of a second, we can recognize whether something we see is an animal or not. Our results show that this immediate, rough impression probably depends on recognizing just one or more individual parts of what we see. Fine discriminations – such as recognizing individual faces – take longer to happen, and our study suggests that this delay depends upon emerging signals for combinations of shape fragments. In a sense, the brain has to construct an internal representation of an object from disparate pieces."

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