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Lehigh University

Extrusion for Greener Aluminum Production

by Lehigh University
Aluminum recycling has become a successful business since its inception a century ago. Nearly a third of the aluminum produced in the United States is made from aluminum scraps that have been recycled in a process—usually remelting—that uses only 5 to 10 percent of the energy it takes to extract aluminum from mined bauxite ore.

Evolution Picks up Hitchhikers

by Lehigh University
In a twist on "survival of the fittest," researchers including biologist Greg Lang have discovered that evolution is driven not by a single beneficial mutation but rather by a group of mutations, including ones called "genetic hitchhikers" that are simply along for the ride.