Progressive Engineer Magazine has posted a new company profile: ReRev, Green Revolution, and Henry Works are developing exercise machines that generate electricity, harnessing a new form of renewable energy.

ReRev, Human Dynamo,and the Green Revolution Generating Electricity from Exercise MachinesHudson Harr started with an elliptical machineand parlayed his invention into ReRev.By Tom GibsonJust four short years ago, Hudson Harr was a 21-year-old freshly minted college...