Dark-matter test faces obstacles
Access to crystals may hamper bid to repeat experiment.
Initiative targets malaria eradication
Focus shifts to blocking parasite transmission.
US habitat rule threatens species
Conservationists call for change to Bush-era definition of ‘endangered’.
Science favoured by German coalition
Budgets set to double as new government backs previous spending commitments.
A natural-hazards expert talks about surveying the destruction in Samoa.