YAWN BONDS Chimps catch yawns not only from members of their group but from familiar and unfamiliar people, a new study finds. Researchers suggest that the apes employ this form of empathic behavior with humanlike flexibility.
M. Campbell and F. de Waal 2014/Yerkes National Primate Research Center/Emory Univ.
CLOSER LOOK AT PHOSPHORENE Sheets of phosphorous just one atom thick have a ridged structure, as shown in this illustration. Graphene sheets, which are made of carbon, are flat.
P. Ye
LOW CAL Unlike normal worms, calorie-restricted C. elegans (one shown) maintain high levels of the brain chemicals serotonin and dopamine, a new study finds.
Kbradnam/Wikimedia Commons
UP IN THE AIR Clouds can both warm and cool the planet. How clouds will respond to global warming is the largest source of uncertainty in climate change predictions.
NASA
LURKER The twitches that let a European garden spider know that lunch has landed may not be as easy to detect if strands of its web anchor to human-made materials.
kellylovesphotography/iStockphoto
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