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Photo: A competitor flexes his muscles during the Sixth World BodyBuilding & Physique Sports competition in Mumbai on Tuesday. More than 400 competitors from 48 countries participated in the competition.

Bilingual news: A new form of artificial skin, threaded with a network of artificial sensors, could re-create the sense of touch for people wearing prosthetic limbs, researchers revealed on Tuesday. Researchers in South Korea and the US have developed a new form of ultrathin sensors that can pick up sensations of heat, pressure and moisture, MIT Technology Review reports. The sensors are malleable enough to be woven into a thin layer of polymer. The breakthrough, researchers say, came when they packed the skin with enough sensors, up to 400 per square millimeter, to re-create the sensations of human touch.

Buzzword: "Duck face" is an exaggerated pouting expression in which the lips are thrust outward, typically made by a person posing for a photograph. The term has gained the legitimacy that can only be awarded by an entry into OxfordDictionaries.com.