Agriculture in developing countries was transformed when scientists met aid officials and convinced them to invest in research. Lowell S. Hardin was there, and believes today's food crisis demands a similar vision.

For many people

Predicting the ocean

Terrestrial ecosystems control carbon dioxide fluxes to and from the atmosphere through photosynthesis and respiration, a balance between net primary productivity and heterotrophic respiration, that determines whether an ecosystem is sequestering carbon or releasing it to the atmosphere.

During the period 1986

Bia?owiez

As the United States heads for a showdown at the polls, its Canadian neighbour is rushing out its own election

A 740,000-year-old wedge of ice discovered in central Yukon Territory, Canada, is the oldest known ice in North America. It suggests that permafrost has survived climates warmer than today's, according to a new study.

Old-growth forests remove carbon dioxide from the atmosphere

Relative rates of temperature change between the troposphere and surface, and the mechanisms that produce these changes, have long been a contentious issue. Graversen et al.predicated upon the ERA-40 reanalysis, report polar tropospheric amplification of surface warming and attempt to explain this finding dynamically. (Brief Communications Arising)