The four types of planetary civilizations, explained by Michio Kaku
The four types of planetary civilizations, explained by Michio Kaku Humanity is a type 0 civilization. Here’s what types 1, 2, and 3 look like, according to physicist Michio Kaku. Subscribe to Big Think on YouTube ► https://www.youtube.com/channel/UCvQECJukTDE2i6aCoMnS-Vg?sub_confirmation=1 Is anybody out there? Renowned physicist Michio Kaku discusses we coulextraterrestrial lifeLINK