Uncategorized
- Astronomy
Landing data confirm Eros’ primitive nature
Gamma rays detected by the NEAR Shoemaker spacecraft after it landed on asteroid 433 Eros add to evidence that the rock is unaltered since the birth of the solar system.
- Tech
Optics oddity challenges microchip makers
An obscure optical effect called instrinsic birefringence has suddenly appeared as a threat to technology for making denser, faster microchips.
- Earth
Atlantic coast may be in for a pounding
The above-average number and strength of hurricanes in the North Atlantic during the past 6 years may signal the beginning of a threatening weather trend for the United States, the Caribbean, and Central America.
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18937
Your story on trace amines in the brain neglected to mention the most interesting and well-studied of these, the powerful endogenous hallucinogen N,N-dimethyltryptamine (DMT). DMTs role in endogenous psychosis was studied intensively in the 1960s, before research with these drugs became so controversial. We recently subjected DMT to intensive study in a group of normal […]
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Obscure brain chemicals draw new attention
Long-dismissed brain chemicals called trace amines have receptors on human cells and may play a role in depression and schizophrenia.
- Materials Science
Environment’s stuck with nonstick coatings
Some nonstick coatings such as Teflon break down at high temperatures into undesirable compounds that persist in the environment.
- Math
Art of Pursuit
The simple mathematical concept of a pursuit curve can serve as the starting point for creating wonderfully intricate artistic designs. Four “bugs” chasing one another produce an intriguing pattern of nested, rotated squares. Courtesy of John Sharp. Pursuit curves based on a star-shaped polygon. Courtesy of John Sharp. Example of a pattern in which the […]
- Math
Art of Pursuit
The simple mathematical concept of a pursuit curve can serve as the starting point for creating wonderfully intricate artistic designs. Four “bugs” chasing one another produce an intriguing pattern of nested, rotated squares. Courtesy of John Sharp. Pursuit curves based on a star-shaped polygon. Courtesy of John Sharp. Example of a pattern in which the […]
- Math
Art of Pursuit
The simple mathematical concept of a pursuit curve can serve as the starting point for creating wonderfully intricate artistic designs. Four “bugs” chasing one another produce an intriguing pattern of nested, rotated squares. Courtesy of John Sharp. Pursuit curves based on a star-shaped polygon. Courtesy of John Sharp. Example of a pattern in which the […]
- Math
Art of Pursuit
The simple mathematical concept of a pursuit curve can serve as the starting point for creating wonderfully intricate artistic designs. Four “bugs” chasing one another produce an intriguing pattern of nested, rotated squares. Courtesy of John Sharp. Pursuit curves based on a star-shaped polygon. Courtesy of John Sharp. Example of a pattern in which the […]
- Math
Art of Pursuit
The simple mathematical concept of a pursuit curve can serve as the starting point for creating wonderfully intricate artistic designs. Four “bugs” chasing one another produce an intriguing pattern of nested, rotated squares. Courtesy of John Sharp. Pursuit curves based on a star-shaped polygon. Courtesy of John Sharp. Example of a pattern in which the […]
- Health & Medicine
Ebola May Enter Cell via Folate Gate
A cell-surface molecule that normally binds to folate might be targeted by Ebola and Marburg viruses as their entry point to people's cells.
