Uncategorized
- Health & Medicine
Carbon monoxide may limit vascular damage
Carbon monoxide given in small doses to rats can prevent injury to blood vessels caused by surgery.
- Archaeology
Farming sprouted in ancient Ecuador
Analyses of microscopic plant remains from two archaeological sites indicate that people began to grow squash in Ecuador's lowlands between 10,000 and 9,000 years ago, when agriculture was also taking root in Mexico.
- Math
Knotty Calculations
An alternative approach to quantum computing takes advantage of space-time knots and braids.
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Mining the Mouse
Recent analyses of the mouse genome illuminate human health and evolution.
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19034
Phthalates have been subject to significant regulatory scrutiny by governmental agencies. Centers for Disease Control and Prevention data show exposure levels well within the safety levels established by federal regulators. Further, a growing body of evidence indicates that studies using rodents may not be relevant to humans. Marian K. StanleyAmerican Chemical CouncilArlington, Va.
- Earth
Proof of Burden
Two teams of scientists report that the blood and urine of most Americans contain toxic cocktails of metals, artificial hormones, and chemical ingredients of plastics, flame retardants, pesticides, herbicides, and disinfectants.
- Humans
From the July 12, 1930, issue
FISH’S-EYE VIEW A poet once wished for the gift to see ourselves as others see us. An artist has achieved it. Wilfrid Swancourt Bronson, of New York, has cultivated the ability to see things from the fish’s point of view, taking into account the squeezed perspective one gets through the little “window” in the water […]
- Planetary Science
Space Class
If you’re looking for classroom materials tied to recent NASA news reports, such as evidence suggesting the presence of water on Mars, this Web site pulls together a variety of articles, images, and Web links related to any given report. The archive includes topics such as solar storms, meteors, planetary alignments, eclipses, and many others. […]
- Math
Pinpointing Prey
Eight command neurons (black) represent the eight directions of the legs from which they receive input. Partner neurons (gray) send inhibitory signals. van Hemmen et al./Physical Review Letters Under cover of darkness, a burrowing cockroach skitters across the desert sand. Its rapidly moving legs excite tiny ripples that travel along the ground, tipping off a […]
- Health & Medicine
Being a dad comes naturally
Men whose wives are about to give birth show hormonal fluctuations that may predispose them to better parenting behavior.
- Health & Medicine
Heart risks linked to infertility syndrome
Women with polycystic ovaries—commonly linked to infertility—are more likely than women without the disease to show early signs of heart disease.
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19223
The July 8 story about “trilobite farming” states that “these trilobites would be the earliest creatures known to have forged a partnership with another species.” What about the fact that eukaryotes formed a partnership with other single-celled creatures that became mitochondria or chloroplasts? Now, if you mean that this was the first extracellular partnership, then […]
