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Kids swap DNA for fairground rides

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

River metals linked to tar sand extraction

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

World view: Politicize me

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

The mystery of the missing oil plume

Confounding reports seed confusion over long-term effects of the spill.

Climate panel must adapt to survive

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

Cold blamed for Bolivia's mass fish deaths

Extreme weather wreaks havoc in the rivers.

When hasty headlines fail to shake a family tree

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

Stem-cell work thrown into limbo

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

News briefing: 27 August–2 September 2010

The week in science.

Ecologists fear Antarctic krill crisis

Fishing industry threatens to destabilize stocks.

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.

Superfast TB test slashes waiting time

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

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.

Comet theory carbonized

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

Venus crater debate heats up

A history of dramatic geological change is questioned.