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19348
Is it within the realm of feasibility that electrons possess an underlying quarklike structure in the manner of protons and neutrons? The hypothesis that electrons can be subdivided into smaller particles termed “electrinos” offers an ideal experimental opportunity to test this concept. Each contingent of such particles could be subjected to repeated expansions into ever […]
- Physics
Electron breakup? Physics shake-up
A controversial theoretical proposal that challenges more than a century of theory and experiments suggests that loose electrons in liquid helium may break into pieces, dubbed electrinos.
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19347
I read and reread this article, hoping to find an explanation of where all those sediments have gone. From appearances, they surely all haven’t been deposited in the Gulf of California. Where else? Does anyone have any satisfying theories? Allen Glenn Abilene, Texas Sediments from the erosion of the Grand Canyon have ended up in […]
- Earth
The Making of a Grand Canyon
Carving this beloved hole in the ground may not have been such a long-term project.
- Computing
Virtual stampede sees faces in crowd
A new computer model based on particle interactions suggests ways to prevent a panicked crowd from stampeding.
- Physics
One-molecule chemistry gets big reaction
Carrying out a widely used chemical reaction on one molecule at a time, researchers demonstrate unprecedented control of molecular behavior and, possibly, the ability to make novel nanotechnology devices and compounds that can't be created with ordinary chemistry.
- Plants
Glitch splits hermaphrodite flowers
In a newly proposed scenario, polyploidy may trigger perfectly good hermaphrodite plants to evolve gender forms.
- Astronomy
Craft finds where sun’s corona gets its hots
New findings may help explain an enduring solar riddle: Although the sun's outer atmosphere lies thousands of kilometers above the visible surface of the sun, it's about 1,000 times hotter.
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19346
Your article says elevated concentrations of glucose in the blood is “a problem that occurs downstream” of impaired response to insulin. Yet artery blockage is defined as a failure of cells to react to insulin. So, would not the problem be upstream of the impairment? Marry Morel Prescott, Ariz. Downstream of the impairment, here, means […]
- Health & Medicine
Insulin inaction may hurt even nondiabetics
Flawed insulin activity may lead to blood changes that foster atherosclerosis, even in people who don't have diabetes.
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Memory echoes in brain’s sensory terrain
The process of remembering an event reactivates brain regions that were involved in initially seeing or hearing the event.
