Elon Reeve Musk (born June 28, 1971) is an entrepreneur and business magnate. He is the founder, CEO and Chief Engineer at SpaceX; early-stage investor, CEO and Product Architect of Tesla, Inc.; founder of The Boring Company; and co-founder of Neuralink and OpenAI. With an estimated net worth of around US$280 billion as of December 2021,[2] Musk is the wealthiest person in the world. Musk was born to a Canadian mother and South African father, and raised in Pretoria, South Africa. He briefly attended the University of Pretoria before moving to Canada at age 17 to avoid conscription. He was enrolled at Queen's University and transferred to the University of Pennsylvania two years later, where he received a bachelor's degree in economics and physics, then moved to California in 1995 to attend Stanford University but decided instead to pursue a business career, co-founding the web software company Zip2 with his brother Kimbal. The startup was acquired by Compaq for $307 million in 1999. The same year, Musk co-founded online bank X.com, which merged with Confinity in 2000 to form PayPal. The company was bought by eBay in 2002 for $1.5 billion. In 2006, he helped create SolarCity, a solar energy services company that was later acquired by Tesla and became Tesla Energy. In 2015, he co-founded OpenAI, a nonprofit research company that promotes friendly artificial intelligence. In 2016, he co-founded Neuralink, a neurotechnology company focused on developing brain–computer interfaces, and founded The Boring Company, a tunnel construction company. Musk has proposed the Hyperloop, a high-speed vactrain transportation system. Also he reportedly bought Twitter.