Uncategorized
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19167
Just because chemical equipment can measure parts per trillion doesn’t necessarily mean that they have any biological significance. If you took one pill of Tylenol and dissolved in an olympic-size swimming pool, that would roughly be 1 part per billion. One part per trillion would be one pill in 1,000 swimming pools. My point is […]
- Earth
Excreted Drugs: Something Looks Fishy
Drugs that the body can't fully use enter waste water, where they may affect aquatic life—or wind up in tap water.
- Humans
From the June 14, 1930, issue
1,500,000,000 YEARS OF LIFE PORTRAYED IN GREAT HALL OF PAINTINGS Fifteen hundred million years of life on this planet will be unrolled as a single connected epic in a series of three majestic new halls planned for the Field Museum of Natural History in Chicago. Fossils, rocks, mounted plant and animal specimens, paintings, and statuary […]
- Earth
Disaster Pix
If you’re one of those people who need to see the extent of intense weather events and great natural disasters–preferably as they are developing–this Web site is for you. Satellite images, provided by the National Oceanic and Atmospheric Administration’s Operational Significant Event Imagery division, portray hurricanes, dust storms, snowfall, forest fires, volcanic plumes, and much […]
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- Health & Medicine
Imaging Parkinson’s
A new brain-imaging technique can supply proof of Parkinson's disease in people whose symptoms fall short of the standard definition of the disease.
- Health & Medicine
Zapping bone brings relief from tumor pain
By unleashing radio waves inside bone, researchers have stopped intractable pain in people with cancer that has spread to their skeletons.
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19166
I read your article about bilirubin protecting cells from free radicals and possibly cancer and heart disease. People with Gilbert’s syndrome, which affects 5 percent of the population, have higher-than-normal amounts of bilirubin in their blood. Has any study been conducted to ascertain whether people with Gilbert’s syndrome have a lower incidence of cancer and […]
- Health & Medicine
Bilirubin: Both villain and hero?
Bilirubin, which causes jaundice in newborns, may protect against cellular damage.
- Astronomy
Sizing up small stars
Astronomers have for the first time measured with high precision the size of a small star, Proxima Centauri, the known star nearest to the solar system.
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19165
“Waves,” or crenulations, occur not only on water icicles, but also in caves on dripstone and flowstone speleothems composed of calcite, epsomite, goethite, and even mud. All of these formations display “wavelengths” of around 1 centimeter. The origin of these crenulations is due not to heat, but to greater evaporation and carbon dioxide loss from […]
- Physics
Icicle waves go with the flow
A new model of icicle growth may explain the strange fact that ripples often found on those icy spikes typically sit about 1 centimeter apart, whether the icicles themselves are big or small.
