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Chemistry

Molecular machines split water

Hydrogen derived from molecular machines that use solar energy to split water, rather than hydrogen from fossil fuels, could drive future fuel cell vehicles.

Health & Medicine

Juice could ward off cancer in smokers

Drinking grapefruit juice every day could reduce the risk of developing cancer from smoking.

Earth

Compost reduces landfill gas

Field tests suggest that covering solid waste with compost instead of conventional soil could reduce methane-gas emissions from landfills.

Animals

Owls use tools: Dung is lure for beetles

Burrowing owls' habit of bringing mammal dung to their burrows attracts edible beetles and counts as form of tool use.