Uncategorized
- Earth
Nonstick but not nontoxic
A proliferating pollutant shed by nonstick products and surfactants caused neonatal deaths and developmental impairments in tests with rodents.
- Earth
Testing computers’ hazardous potential
The approved test for evaluating the ability of wastes to leach toxic metals fails to identify lead risks from some electronics equipment.
- Earth
Big worries about little tubes
The size and chemical makeup of some nanotubes being developed for industrial operations resemble mineral fibers, including asbestos, that pose a serious cancer risk.
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Meditation changes
People who meditate display particularly strong immune responses and brain activity that has been linked to emotional improvements, according to preliminary data.
- Paleontology
Oh, what a sticky web they wove
A look inside a piece of 130-million-year-old amber has revealed a thin filament of spider silk with sticky droplets that look just like those produced by modern spiders.
- Humans
Remembering Linus Pauling
Linus Pauling won the 1962 Nobel prize in chemistry for his research into the nature of chemical bonding and later won the Nobel peace prize and promoted the health benefits of vitamin C. This National Library of Medicine Web site highlights Pauling’s achievements and offers access to parts of a large collection of his personal […]
- Humans
From the August 26, 1933, issue
AN APE FOR A BABY SISTER If it is not possible or desirable to bring up the young human removed from human surroundings–why not test the effects of civilization in the reverse matter? Why not bring up an ape infant in a human home–place him in a human babys bed, dress him in infants clothes, […]
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19038
In the article about infinity, the “stereoscopic” images of tiny squares on page 140 are too far apart to view in the conventional way. However, if the viewer holds the magazine at arm’s length and looks cross-eyed at the pair, the diagonal across the square becomes visible. Robin FrostSanta Barbara, Calif.
- Math
Infinite Wisdom
A mathematician has proposed a new approach to resolve a long-standing question about infinite sets of numbers.
- Tech
Mind-Expanding Machines
Researchers have designed computer systems aimed at amplifying human thought and perception, such as a new type of cockpit display for aircraft pilots that exploits the power of peripheral vision.
- Math
SET Math
The card game known as SET® is deceptively simple. Its object is to identify, as quickly as possible, a grouping (SET) of three cards, selected from 12 cards laid out face up on a table. A SET deck has 81 (34) cards. Each card displays a design with four attributes: shape, number, shading, and color. […]
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The Naked Truth? Lice hint at a recent origin of clothing
A study of genetic differences among human lice hints at the origin of clothing.
