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