1. Climate

    The hidden costs of better fuels

    Whether crop-based biofuels will reduce greenhouse gas emissions depends on how, and where, they're grown.

  2. Humans

    AAAS: March of the Hungry Penguins

    Patagonian penguins have become sentinels of climate change and human impacts on the marine world.

  3. Earth

    First wave

    The Maldives, a chain of some 1,200 islands in the middle of the Indian Ocean, sits about 700 kilometers southwest of Sri Lanka and lures more than half a million adventurers each year. They come to this smallest of Asian countries to scuba dive, surf, fish and cruise in picturesque atolls known for white sandy […]

  4. Climate

    Plumes of arctic haze traced to Russia, Kazakhstan

    Smoke from forest fires, agricultural burning may be substantial part of springtime plumes.

  5. Climate

    Winter birds shift north

    More than 170 common North American species are wintering farther north than they did in the past.

  6. 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.

  7. Tech

    Stimulus bill doesn’t ignore R&D

    Featured blog: Here's where the economic-stimulus bill would attempt to revamp and reinvigorate federally financed research.

  8. Earth

    Steven Chu’s Senate Confirmation Looks Certain

    Senate energy committee appreciates Obama's pick for Secretary of Energy.

  9. Earth

    Warmer oceans would fuel more thunderstorms

    Satellite data reveal more thunderheads forming as tropical sea-surface temperatures rise.

  10. Earth

    Obama administration should lead energy transition

    R.K. Pachauri, an engineer and economist by training, is director-general of The Energy and Resources Institute in New Delhi, India, and a corecipient of the 2007 Nobel Peace Prize for his role as chief of the Intergovernmental Panel on Climate Change. The IPCC periodically issues consensus reports on the science of climate change. Senior editor Janet Raloff spoke with him about changes he hopes to see from the Obama administration.

  11. Climate

    Holdren to Head White House Science

    It appears that another physicist with Nobel ties is set to become the primary Obama adviser on science.

  12. Ecosystems

    Thwarting Tree Poachers

    A new federal rule makes it harder to destroy protected forests.