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19172
I was encouraged to read this article. I’ve often wondered when researchers outside addiction research would realize type II diabetes is the result of addiction to foods that chronically elevate insulin levels, thus acting as antidepressants. Once physicians recognize carbohydrate abuse as drug abuse, we’ll be better situated to provide appropriate interventions. Betty Streett Clarksdale, […]
- Math
Chemical Dissections
In recreational mathematics, a geometric dissection involves cutting a geometric figure into pieces that you can reassemble into another figure. For example, it’s possible to slice a square into four angular pieces that can be rearranged into an equilateral triangle. The same four pieces can be assembled into a square or an equilateral triangle. Sets […]
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From Bone to Brain: Transplanted male bone marrow makes nerve cells in women and girls
Transplanted bone marrow can form new nerve cells in the brains of people.
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19171
After reading this article, I couldn’t believe that the manuscript didn’t identify the chemical substance involved. Eck Prud’hommeFort Worth, Texas The amino acid mentioned in the story is p -aminophenylalanine .–J. Gorman
- Chemistry
Unnatural Biochemistry: Bacteria make and use an alien amino acid
Researchers have constructed an organism that synthesizes and incorporates an extra amino acid into its proteins.
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Smells Like Emotion: Brain splits duties to sniff out feelings
A study suggests that a brain structure called the amygdala assesses the emotional intensity of both pleasant and unpleasant sensations, thus challenging prior evidence that it primarily coordinates fear responses.
- Animals
One-Two Poison: Scorpion starts with a cheap shot
A South African scorpion economizes as it stings, injecting a simple mix first, followed by a venom that's more complicated to produce.
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19208
I wonder whether researchers offer any recommendations based on a difference in effect between ingesting vitamin A and beta-carotene. Do people who consume large amounts of yellow vegetables, for example, put themselves at risk? Mary A. TurzilloBerea, Ohio Yellow fruits and vegetables contain large amounts of the vitamin A precursor beta-carotene. However, says Margo Denke […]
- Health & Medicine
Too Much of a Good Thing: Excess vitamin A may hike bone-fracture rate
Dietary studies suggest that people who consume large amounts of vitamin A in foods or multivitamins are more likely to suffer hip fractures than are people who ingest modest amounts.
- Tech
Fiber Helper: Minuscule controllers may open data floodgates
A device that fits on the end of optical fibers may make possible the next big boost in Internet speed without new underground cables.
- Astronomy
In the Beginning: Dark matter builds galaxies, feeds quasars
Cosmologists say they have found compelling evidence that massive galaxies were already in place when the universe was less than a billion years old.
- Paleontology
Wings Aplenty: Dinosaur species had feathered hind limbs
A team of Chinese paleontologists has discovered fossils of a small, feathered dinosaur that they say had four wings.
