Feature
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Not Just Hitchhikers
Salmonella and other human pathogens on vegetables aren't just riding along like casual smears of dirt; they're moving in and setting up housekeeping.
- Earth
Invasive, Indeed
Some people may live lightly on the land, but the demands of the world's population as a whole consume nearly a quarter of Earth's total biological productivity.
- Tech
Disappearing Ink
Coming to your tattoo parlor soon: New inks that allow clients to have their designs cleanly erased if embarrassment or regret sets in.
- Plants
Stalking the Green Meat Eaters
Pitcher plants in a New England bog hold little ecosystems in their leaves, and also act as indicators of the bog's ecological health.
- Astronomy
Sputnik + 50
The launch of Sputnik 1, 50 years ago, ushered in a scientific and technological revolution, but dreams of the human conquest of space have faded.
- Earth
Clearly Concerning
The toxicity of a chemical that leaches from a widely used plastic receives conflicting evaluations in two new reviews.
- Physics
Electron Superhighway
The remarkable strength and electrical properties of graphene, a chicken-wire network of carbon atoms, make it a promising new material for computer chips.
- Health & Medicine
The Breast Solution
Reversing earlier advice, health authorities now say that babies of HIV-positive mothers in poor countries have a better chance of avoiding infection if they feed only on breast milk that's not supplemented with other food.
- Health & Medicine
Warming to a Cold War Herb
Benefiting from decades of research that took place behind the Iron Curtain, Western physicians are discovering Rhodiola rosea, a cold-weather herb that purportedly fights fatigue and boosts energy.
- Health & Medicine
Curry Power
A component of the spice turmeric, the color-giving ingredient in yellow curries, may help prevent and possibly treat Alzheimer's disease.
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Consciousness in the Raw
Observations of children born without most of the brain's outer layer, or cortex, and evidence from animal studies suggest that a basic form of consciousness may arise from the brain stem alone.
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Genome 2.0
Detailed explorations of the human genome are showing that individual genes may have complex structures, and that much of what had been called junk DNA is not junk at all.
