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LONDON (Reuters) - Field trials are under way in England of a genetically modified (GM) wheat that strikes fear into aphids and attracts a deadly predator to devour them, providing an alternative to the insecticides now used to control the crop pest. The wheat emits a pheromone which aphids release when they are under attack to create panic and prompt the insects to flee, John Pickett, scientific leader of chemical ecology at Rothamsted Research in eastern England, said on Wednesday

More than 70% of the world's fisheries are currently being harvested at capacity or are in decline, but fish are also delicious and quite good for you. What's a conscientious diner to do? The conventional wisdom has always been to avoid big fish at the top of the food chain--marlins, sharks, and tuna, for example--and focus on little fish, like sardines and anchovies, which have shorter lives and can reproduce more quickly.