Uncategorized
- Humans
From the July 13, 1935, issue
An artificial cavern with no echoes, a new theory from Albert Einstein, and an explanation for red shift.
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Ocean Habitats
These Web pages provide a set of lesson plans devoted to organisms that live in the intertidal zone. Geared to grades seven to nine, the activities include studies of a variety of shells, a virtual tour of a rocky coast, and a study of life in a tide pool. Several online videos accompany the lessons. […]
- Astronomy
Triple Play: A planet with three suns
Three suns grace the skies above a newly found, Jupiterlike extrasolar planet, posing a puzzle for how massive planets form in a closely-knit, multiple-star system.
- Physics
Realistic Time Machine? New design could forgo exotic ingredient
A novel time machine concept may avoid a problem of earlier, less-practical proposals by requiring only normal matter and the vacuum known to exist in space.
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19573
In your article you refer to a standard concept of a person speeding “in a rocket traveling slightly less than the speed of light” and say that “motion at such enormous speeds drastically slows the clock for the traveler.” That reasoning, which is common, troubles me. If the traveler is traveling speedily with respect to […]
- Earth
Pollution Ups Blood Pressure: Inhaled particles linked to transient effect
In a laboratory setting, volunteers breathing pollutants generated by sources such as vehicle engines experience slight but steady increases in blood pressure.
- Earth
Arctic Foulers: Foraging seabirds carry contaminants home
When seabirds go out looking for food, they can bring home traces of pollutants that build up around their nesting colonies.
- Earth
Power-laden winds sweep North America
There's more than enough wind power to satisfy the United States' energy requirements, a new analysis of weather data suggests.
- Health & Medicine
Brain Power: Stem cells put a check on nerve disorders
Adult neural stem cells protect the brain against repeated episodes of inflammation in disorders such as multiple sclerosis by killing inflammatory immune cells.
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19572
I was very glad to read of the research done by Stefano Pluchino with adult-mouse stem cells. I am, however, terribly disappointed with his comment that therapeutic trials in humans are 4 to 5 years away. As someone with multiple sclerosis and a scientific background, I see no reason why the timetable can’t be moved […]
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19571
The information in this article represents the first indication of a potential test for the onset of esophageal cancer (EC), the fastest-growing cancer in the United States. EC kills 94.5 percent of patients diagnosed. Unfortunately, until EC has reached stage IV, no symptoms present themselves to the patient. A routine screening procedure that might be […]
- Health & Medicine
Cancer Switch: Good gene is shut off in various malignancies
A gene called Reprimo is shut down in several cancers but rarely in healthy cells.
