'Uppers' affect men's brains more than women's, study finds

Amphetamines, drug stimulants sometimes called "uppers," have a greater effect on the brains of men than on those of women, a study has found. FULL STORY

Ants evolved with the help of plants, study suggests

Ants are far older than previously thought, first appearing 140 million to 168 million years ago, and owe their success to flowering plants, researchers said this week. FULL STORY

Viruses used to build tiny batteries

Researchers attempting to make microscopic machines have altered viruses to collect metal and build wires for use in tiny batteries. FULL STORY

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