User blog comment:Aaron.Hunter/Khan Academy - post 1/@comment-24859467-20140424162800/@comment-121.99.205.43-20140425045829

Ohh, well getting Da Vinci recently helped me get there. Without the 745,000 free energy points you get from mastering 500 skills (you get Magellan, Sally ride, Copernicus, Keplar, Hypatia, Newton and Da Vinci for doing 500) I would be nowhere near 2M.