Let's discover who are these billionaires who are interested in colonising Mars

Stephen Hawking, Kris Jenner and other famous people with plans to send humans to Mars

Bill Gates may be the only celebrity billionaire who's "not big on this whole Mars thing."

https://www.washingtonpost.com/news/speaking-of-science/wp/2017/06/22/from-stephen-hawking-to-kris-jenner-a-list-of-famous-people-who-want-to-send-humans-to-mars/