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Cold blamed for Bolivia's mass fish deaths

Extreme weather wreaks havoc in the rivers.

World view: Politicize me

Barack Obama is finding that sometimes politics needs to put science in its place, says Daniel Sarewitz.

Superfast TB test slashes waiting time

Infection with tuberculosis can be diagnosed easily and accurately in less than two hours.

Ecologists fear Antarctic krill crisis

Fishing industry threatens to destabilize stocks.

Supersolidity flows back

Doubts over the existence of the mysterious quantum phenomenon may soon be laid to rest.

Nanotechnology: Small wonders

The US National Nanotechnology Initiative has spent billions of dollars on submicroscopic science in its first 10 years. Corie Lok finds out where the money went and what the initiative plans to do next.

Climate panel must adapt to survive

Review recommends better governance and transparency for the IPCC in the face of more public scrutiny.

River metals linked to tar sand extraction

Researchers find that pollutants in Canada's Athabasca River are not from natural sources.

Stem-cell work thrown into limbo

US district-court ruling suspends federal funding for research involving human embryonic stem cells.

When hasty headlines fail to shake a family tree

The impact that a newly discovered species makes depends on the completeness of its lineage.

News briefing: 27 August–2 September 2010

The week in science.

Kids swap DNA for fairground rides

Researchers' efforts to collect samples at a fair raise ethical questions.

Deepwater Horizon: After the oil

When oil stopped gushing into the Gulf of Mexico, the ecosystems under assault started on a long road to recovery. Amanda Mascarelli meets the researchers assessing their chances.

'Lost years' end for backyard supernova

Data from repaired Hubble telescope uncover new secrets about our nearest supernova.

Comet theory carbonized

Sediment studies rule out impact as cause of ancient cold spell.