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New geo-chemical research into the theory that a massive asteroid wiped caused the Permian-Triassic extinction event 250 million years ago. African cassava crops and the green mite that attacks them both come from South America, so could a Brazilian mite-eating predator be the farmers' friend? Medical imaging telling us about causes of mental illness. Mutant protein that causes leukemia is now being turned against the disease. Physicists at Fermilab near Chicago prepare to hunt the Higgs boson particle.