Uncategorized
- Tech
Microjaws chomp cells to change them
A tiny, new biomedical device operates on such a small scale that it can grab individual red blood corpuscles in its jaws.
- Tech
Nervy chip may open window into brain
Researchers have built a simple circuit that blends living neurons with silicon-based transistors.
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18962
I just read the article and I’m dying to know what motivated the patient to undergo such an experimental (transatlantic) form of an otherwise routine surgery. Any info available? Henry Jones Baton Rouge, La.Her doctors say the patient was simply interested in advancing medical science and that she knew that several surgeons were standing by […]
- Health & Medicine
Oceans apart, but surgery succeeds
A French group performed the first transatlantic operation when surgeons in New York controlled a robot in Strasbourg, France, which removed a woman's gall bladder.
- Health & Medicine
For a change, infection stymies HIV
A hepatitis-like virus that causes no known diseases seems to help people stave off the progression of HIV, the AIDS virus.
- Physics
Constant Changes
Evidence from the early universe that one of the so-called constants of nature, known as alpha, was once slightly smaller than it is today hints that the laws of physics themselves may vary over time and space.
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18961
I detect a blind spot in this article. Theorists were quick to offer explanations of why the fine-structure constant might have been different 12 billion years ago. But no one thought to question the chain of reasoning that led to that conclusion. We know that quasar spectra are drastically redshifted during their multibillion-year journey to […]
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18969
If, as it appears from “Ill winds,” dust storms are so important, and if they can be tracked from space, it would seem as though the weather bureaus should give dust storm warnings, as they do for hurricanes, tornados, and thunderstorms. It might be difficult to get across to government bureaus that this is important, […]
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From the October 3, 1931 issue
A SEA-GOING LIZARD FROM GALAPAGOS When Darwin, as a young naturalist just out of school, visited the Galpagos islands, he saw a number of things that helped to crystallize and precipitate in his mind the concept, already seeded there, that later revolutionized all biology and much of philosophy. Not the least provocative of speculation was […]
- Math
Knot Views
Interested in playing around with some mathematical knots? Manuel Arala Chaves of the University of Porto in Portugal has created a table illustrating all 75 knots with up to 9 crossings in their standard representation. If your computer can handle LiveGraphics3D, you can manipulate the knots in three dimensions and look at them from different […]
- Math
Follow the Leader
In the sport of orienteering, a competitor uses a detailed map (and perhaps a compass) to navigate his or her way across varied terrain following a course drawn on the map. Selecting the best available route, each participant races from one marker to the next in the required sequence. The winner is the person who […]
