Gravity, Space, Time

Apr 1, 2015 • {"login"=>"77minds", "email"=>"77minds@gmail.com", "display_name"=>"Karthikeyan", "first_name"=>"", "last_name"=>""}

https://www.youtube.com/watch?v=MTY1Kje0yLg

https://www.youtube.com/watch?v=vrqmMoI0wks