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The effects of fishing are certainly not as extreme as the celestial impact that ended the age of the dinosaurs, but in some parts of the tropics we are getting close.
The mystery of why some people stay effortlessly thin while others struggle to keep weight off has come closer to being solved with a study isolating a gene that affects appetite.
Does a dirty scoundrel need a bath or a moral lesson? Our brains easily confuse metaphor for reality, often with dangerous consequences, says Stanford biology professor Robert Sapolsky.