Feature
- 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.
- Earth
What Goes Up
A massive scientific field study in Mexico City, along with lab experiments and computer simulations, show that pollution from the world's megacities has a global impact.
- Humans
The Wealth of Nations
Analysis of the connections among different types of economic activities explains why some countries succeed, and others fail, in diversifying their economies.
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Rethinking Bad Taste
Many animals use mimicry to gain a competitive advantage, but are there degrees of cheating?
- Tech
Fire Inside
The events of 9/11 put new urgency into efforts to design buildings able to withstand the structural damage that fire can cause.
- Earth
Cellulose Dreams
Turning cellulose from plants into ethanol for fuel could help lower greenhouse-gas emissions—but the conversion is far from straightforward.
