Earth
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- Climate
The hidden costs of better fuels
Whether crop-based biofuels will reduce greenhouse gas emissions depends on how, and where, they're grown.
- Planetary Science
Earth may be home to unearthly life
No need to look on other planets for new forms of life — weird life could exist right here on Earth.
- Humans
AAAS: March of the Hungry Penguins
Patagonian penguins have become sentinels of climate change and human impacts on the marine world.
- Agriculture
AAAS: Stress Can Make Plants More Nutritious
People who aren't veggie lovers might want to seek out types of produce that deliver an especially big nutrient bang for the gram.
- Space
Cosmic mystery
High-energy invaders from space could signal a nearby pulsar, or perhaps dark matter.
- Earth
First wave
The presidents of two island nations draft escape plans, anticipating sea level rise.
- Climate
Plumes of arctic haze traced to Russia, Kazakhstan
Smoke from forest fires, agricultural burning may be substantial part of springtime plumes.
- Chemistry
Supergoo Erases ‘Monument-al’ Nuclear Fallout
From disposable diapers comes a technology that can be used to extract radionuclides off of the porous surfaces of buildings.
- Climate
Winter birds shift north
More than 170 common North American species are wintering farther north than they did in the past.
- Ecosystems
Flowering plants welcome other life
When angiosperms diversified 100 million years ago, they opened new niches for ants, plants and frogs.
- Earth
California may yet get the first greenhouse gas limits for cars
President Obama decides to revisit a controversial decision made less than a year ago by his predecessor.
