Uncategorized
- Math
Perfect Magic Cubes
A magic cube is a three-dimensional array of whole numbers, in which each row, column, and body diagonal (corner to corner, through the center) adds up to the same total. A perfect magic cube is one in which the diagonals of each vertical or horizontal slice through the cube also sum to the same value. […]
- Tech
Gene Screen: Ultrasensitive nanowires catch mutations
Researchers have devised a nanowire sensor that binds to DNA molecules and produces an electrical signal almost instantaneously.
- Health & Medicine
Pivotal Protein: Inhibiting immune compound slows sepsis
By restraining the action of an immune system protein that can run amok, scientists experimenting on mice have reversed the course of severe sepsis.
- Earth
Blasts from the Past: Orbiting radar spots old nuclear-test sites
A technique that analyzes satellite images to detect subtle ground motions often can perceive subsidence over underground nuclear-test sites, sometimes even if those tests occurred decades ago.
- Paleontology
Ancestral Handful: Tiny skull puts Asia at root of primate tree
Researchers have unearthed the partial skull of the oldest known primate, a tiny creature that lived in south-central China 55 million years ago.
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19368
In this article, the statement is made that personal environmental exposures to volatile organic compounds (VOCs) are easily solved. The implication is that if you have a long commute and are thereby exposed to high concentrations of VOCs, you should just quit your job to avoid exposure. I find that completely absurd. Mark PalmerRichland, Wash. […]
- Earth
My Own Private Bad-Air Day: Outdoor data underrate pollutant exposure
Most people breathe in substantially more organic contaminants than airborne concentrations of such substances in their homes and communities would suggest.
- Animals
Whale Haunt: Nursing, feeding spot found off south Chile
A survey along the coast of southern Chile has turned up a previously undocumented blue whale hangout that seems to be a feeding ground.
- Physics
Topsy Turvy: In neutrons and protons, quarks take wrong turns
Revved-up particles, namely quarks, spinning inside neutrons in the opposite direction to that of the neutrons themselves, challenge the prevailing model of how quarks behave.
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- Planetary Science
Journey to Mars
The rugged Mars Exploration Rover (MER) is scheduled to land on Mars on Jan. 4, 2004. A variety of Web sites offer information about the exploration of Mars and Mars rovers. Check out the official MER Web site for background information and up-to-the-minute reports. San Francisco’s Exploratorium Web site highlights various Mars-related activities. Go to: […]
- Earth
New technique dates glaze on desert rocks
Scientists have developed a quick, easy, portable, and nondestructive way to determine the age of desert varnish, the mysterious dark coating that slowly develops on rocks in many arid regions of the world.
