Uncategorized
- Tech
Circuitry in a nanowire: Novel growth method may transform chips
Made from alternating bands of different semiconductors, a new type of superthin wire incorporates working electronic and optical devices within the wire itself, raising the prospect of making extremely tiny and versatile circuits from the striped filaments.
- Math
Algebraic Hearts
One of the marvels of mathematics is the way in which an austere equation can unexpectedly blossom into an appealing geometric shape when represented graphically. Cardioid. Picture of an algebraic heart. Gabriel Taubin A heart surface colored according to Gaussian curvature (left) and direction (right). Michael Trott/Wolfram Research A heart-y prime puzzle. Ed Pegg Jr. […]
- Physics
Light comes to halt again—in a solid
By stopping laser light pulses cold in a crystal, storing them, and then releasing them, physicists have achieved the same feat accomplished last year in gases, but this time in a more practical material.
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Unfertilized monkey eggs make stem cells
Scientists have for the first time obtained long-lived stem cells from monkey eggs stimulated to undergo parthenogenesis.
- Health & Medicine
Heart recipients add their own cells
Transplanted hearts incorporate muscle and blood-vessel cells from their new host, suggesting that the heart may regenerate its own tissue.
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Bug Watching
Crazy about insects? The Sonoran Arthropod Studies Institute in Arizona has a “Backyard Bugwatching” page with links to photos and articles focusing on a variety of insects and their diverse habitats. Learn what it takes to track Mexican leaf-cutter ants and catch bullet ants. Journey to Costa Rica’s rainforests for close-ups of novel arthropods. Watch […]
- Earth
Old pesticide still makes it to Arctic
Molecules of the pesticides known as chlordanes, which belong to a class of long-lasting organochlorine pollutants, circulate in Arctic air years after they were applied in temperate latitudes.
- Health & Medicine
DREAMing away pain
Mutant mice lacking a certain regulatory protein overproduce a natural opioid and are less sensitive to pain than are other mice.
- Archaeology
Skulls attest to Iron Age scalping
Archaeologists identified four skulls, previously found in southern Siberia, that bore incisions attesting to the practice of scalping in that region around 2,500 years ago.
- Materials Science
Carbon pods are more than a pack of peas
Researchers have found that they can manipulate the electronic properties of nanoscopic carbon structures.
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Meeting Danielle the Tarantula
Insect zoos have no lions, tigers, or bears but can give plenty of thrills, courtesy of tarantulas, giant beetles, and exotic grasshoppers.
