Uncategorized
- Health & Medicine
Predicting Prostate Cancer’s Moves
To guide treatment decisions in individual cases of prostate cancer, medical researchers are using gene-expression profiling and other novel techniques to develop better predictive markers of how a given tumor will behave.
- Earth
On Shifting Ground
In earthquake-prone areas of the United States and elsewhere in the world, debates go on over whether—and how much—to reinforce buildings.
- Humans
From the August 19, 1933, issue
CONSTRUCTION BEGUN ON 80-INCH TEXAS TELESCOPE The giant 80-inch reflecting telescope that will spy upon the stars from McDonald Observatory, to be erected on a peak of Davis Mountains, Texas, is now under construction. A contract for the telescope has been approved by the University of Texas board of regents, and Warner and Swasey Company […]
- Planetary Science
Mars Encounter
On Aug. 27, Mars and Earth will be closer to each other than at any other time in the last 50,000 years. Amateur astronomers with small backyard telescopes can already view features such as dust clouds, the southern polar ice cap (because the southern cap is tipped toward Earth), and volcanic terrain. This NASA Web […]
- Math
Golf Clubs and Driving Distance
The last 20 years have seen remarkable changes in golf equipment: metal-headed drivers, forgiving irons, new putter variants, juiced golf balls, and more. Have these technology changes led to improved performance? Anecdotal evidence certainly points to such improvements. In 1980, for example, the leader in driving distance on the Professional Golfers of America (PGA) Tour […]
-
19337
Your article worries that hydrogen-fuel leakage may add to stratospheric ozone problems. Doesn’t that presuppose that the hydrogen for fuel is generated from a fossil source? What if the hydrogen is generated from air, seawater, or biomass? Clark WaiteDescanso, Calif. The source of the extra hydrogen molecules doesn’t matter, says geochemist John M. Eiler of […]
- Earth
Not So Green? Using hydrogen as fuel may hurt environment
Replacing fossil fuels with clean-burning hydrogen—considered to be a way to reduce globe-warming carbon dioxide—may create a different set of environmental problems, including larger and longer-lasting ozone holes.
- Humans
Small World After All: Short e-mail chains reach targets worldwide
A large-scale study of e-mail users has borne out the notion that one person on the planet can reach any other person through a chain of about six social ties.
- Chemistry
Amending the Genetic Code: Yeast adds new amino acids to its proteins
Researchers have created yeast cells that add one of five unnatural amino acids to their natural 20-piece construction set.
- Ecosystems
Risky High Life: Mountain creatures prove extra-vulnerable
Some of the species hardest hit by climate change will be those living in particular mountain highlands.
- Earth
Saltier Water: Climate change can slow ocean’s absorption of carbon dioxide gas
A decrease in precipitation over the Pacific Ocean north of Hawaii in recent years has left the ocean there saltier and has diminished its ability to soak up carbon dioxide.
- Health & Medicine
Brawny Brains: Creatine pills may aid memory and cognition
The popular muscle-building supplement creatine can boost performance on mental tests.
