Elon Reeve Musk (; born June 28, 1971) is a South African-born Canadian-American business magnate, engineer, and investor. He is the founder, CEO and CTO of SpaceX; co-founder, CEO and product architect of Tesla Motors; chairman of SolarCity, co-chairman of OpenAI; co-founder of Zip2; and co-founder of PayPal. As of April 2016, he has an estimated net worth of US$12.3 billion, making him the 68th wealthiest person in the US. Musk has stated that the goals of SolarCity, Tesla Motors, and SpaceX revolve around his vision to change the world and humanity. His goals include reducing global warming through sustainable energy production and consumption, and reducing the „risk of human extinction” by „making life multiplanetary” by setting up a human colony on Mars. He has envisioned a high-speed transportation system known as the Hyperloop, and has proposed a VTOL supersonic jet aircraft with electric fan propulsion, known as the Musk electric jet.