especially among certain American athletes (more influential than scientists here): http://www.rollingstone.com/culture/news/kyrie-irvings-idiotic-flat-earth-belief-is-catching-on-w494810

BTW I've seen photos taken in the 1940s using rocket-mounted cameras (IIRC using surrendered German V-2) that clearly show a curved horizon. I think this fellow won't go high enough for that.