Your Editorial 'Markets can save forests' (Nature 452, 127

Dora Akunyili is director-general of Nigeria's National Agency for Food and Drug Administration and Control (NAFDAC). Since her appointment in 2001, she has led a successful crusade against counterfeit pharmaceuticals, which are responsible for millions of deaths worldwide each year.

Past atmospheric methane concentrations show strong fluctuations in parallel to rapid glacial climate changes in the Northern Hemisphere, superimposed on a glacial

It is now clear that fished populations can fluctuate more than unharvested stocks. However, it is not clear why. Here the authors distinguish among three major competing mechanisms for this phenomenon, by using the 50-year California Cooperative Oceanic Fisheries Investigations (CalCOFI) larval fish record.

Fishing of natural populations increases the variability of fish abundance. A unique data set from the southern California Current has allowed an evaluation of three hypotheses for why that should be so.

Your News story 'Acclaimed photo was faked' (Nature 451, 1034

When people talk about catastrophic climate change, there's a fair chance that Greenland is on their mind. If they use the term 'tipping point', then it is pretty much a sure thing. One-twentieth of the world's ice is locked up atop that island, and if it were to melt completely, global sea levels would rise by seven metres. The collapse of the Greenland ice sheet is in the front rank of potential climate catastrophes.

More than 70 international climate scientists met in Kathmandu earlier this month to begin the tricky scientific

Biologists in Madagascar have come up with a highly detailed conservation plan using a new tool for identifying biodiversity hotspots, which analyses an unprecedented range of species over small geographical areas.

How big is the energy challenge of climate change? The technological advances needed to stabilize carbon dioxide emissions may be greater than we think, argue Roger Pielke Jr, Tom Wigley and Christopher Green.