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Life

Primate vision puts pieces together

Study suggests nerve cells in retinas create an intricate system of interlocking receptive fields.

Earth

Arctic ice more vulnerable than ever

Ocean’s ice cap is smaller than long-term average and thinnest yet as melt season begins.

Chemistry

Bubbles turn on chemical catalysts

Mechanical force could help chemical compounds spur reactions when the time is right.

Animals

Chimps ambidextrous when digging wells

A survey of water-collection holes dug on the banks of an African river by wild chimpanzees indicates that, unlike people, these apes don’t have a preference for using either the right or left hand on manual tasks.