on 2019/02/10
Inventos y cosas que estuvieron adelantados a su época.
https://www.youtube.com/watch?v=t5dxyOzegp8
https://www.youtube.com/watch?v=DUBs4kGZUec
https://www.youtube.com/watch?v=DJJGdgMKPOA
https://www.youtube.com/watch?v=lDZz0EJhK34
https://www.youtube.com/watch?v=PjswnT52SgE
https://www.youtube.com/watch?v=2kxFVLIjxgA