Uncategorized
- Math
A Fair Deal for Housemates
A triangulated triangle with a proper Sperner labeling and an odd number (3) of elementary triangles possessing all three labels (shown in color). Four friends move into a house and find they must choose among four rooms of different size and quality. Instead of sharing the rent equally, they decide to divide the total so […]
- Health & Medicine
Targeted Therapies
Tailoring prescriptions based on a person's genes may help reduce side effects and allow the development of more personalized medicine.
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19115
This article comments that factors other than drought, such as disease, may have been at work in accounting for the disappearance of some Anasazi groups. If it is found that disease was a major factor, it would be unprecedented. As far as has been determined, the Anasazi didn’t experience exotic, culture-busting pathogens until Columbus made […]
- Archaeology
Could the Anasazi have stayed?
New computer simulations of the changing environmental conditions around one of the Anasazi cultural centers in the first part of the last millennium suggest that drought wasn't the only factor behind a sudden collapse of the civilization.
- Earth
Chinese records show typhoon cycles
Historical records compiled by local governments along China's southeastern coast during the past 1,000 years suggest that there's a 50-year cycle in the annual number of typhoons that strike the area.
- Earth
Cave formations yield seismic clues
Analyses of toppled stalagmites and other fallen rock formations in two Israeli caves may provide hints about the rate of ancient earthquakes in the area.
- Animals
Many fish run on empty
Many fish eat all the time, while some others spend their days going from brief feast to lengthy famine.
- Health & Medicine
Protein flags colon, prostate cancers
A compound first identified as a possible culprit in Huntington's disease may be an indicator of cancers of the prostate gland and colon.
- Animals
Singing frog in China evokes whales, primates
A frog in China warbles and flutes with such versatility that its high-pitched calls sound like those of birds or whales.
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19114
In this article, you state, “The first Fermat number is 22+1, or 5,” and later, “the first four Fermat numbers are prime, but [among] the rest, up to and now including the 24th, none are prime.” Almost all number theorists consider the first Fermat prime to be F0 = 220 + 1 = 3, so […]
- Math
Solving an Ancient African Game
The game of awari has entranced players for thousands of years. Originating in Africa, it remains a popular pastime in many parts of the world. Awari and its numerous variants are instances of “count-and-capture” strategy games, and they are known generically as mancala games. In its traditional form, the awari game “board” consists of two […]
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19113
Why not explore the connection to much greater use of antibiotics, particularly in recent years, including by expectant mothers and very young children? Could not this factor negatively affect immature immune systems, leading to increases in allergic disorders in otherwise healthy people? Robert C. WaggonerMountain Lakes, N.J.
