Stephen Petranek, Angel Investor

Stephen L. Petranek is an angel investor in marine technology companies that reduce CO2 emissions from large cargo ships, fishing and work vessels, and recreational boats. He is an experienced editor of numerous national magazines including Discover, Life, The Washington Post Magazine, and This Old House, as well as prominent technology financial newsletters. He is a science and technology financial writer and the author of "How We Will Live on Mars," published by Simon & Schuster, on which the National Geographic TV series MARS is based. Stephen is also a documentary film producer and speaker at conferences including three main-stage TED Talks.