Mother Nature Network: Suntech Power, one of the most well-known Chinese solar companies, filed for bankruptcy in March, the latest failure in an industry that is evolving, changing and yes, growing. "In a normal business cycle, bankruptcies are a healthy sign of a maturing industry," Travis Hoium of The Motley Fool wrote recently. "In the case of solar, companies with poor cost structures or weak technology will fall by the wayside, leaving their market share to healthier companies with better technology. Since the...