Cracking the problem of river growth

Posted by Washington Post: Juliet Eilperin on November 4th, 2015
ScienceDaily: A general mathematical theory that predicts how cracks spread through materials like glass and ice can also predict the direction in which rivers will grow, according to a new MIT study. In fracture mechanics, the theory of local symmetry predicts that, for example, a crack in a wall will grow in a direction in which the surrounding stress is symmetric around the crack's tip. Scientists at MIT have now applied this theory to the growth of river networks, finding that as a river fed by groundwater......

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