At Tranquility Base via NASA https://t.co/5T8xF3oA8p pic.twitter.com/ZG9qloyL6P
— martinengwicht (@martinengwicht) July 20, 2018
from Twitter https://twitter.com/martinengwicht
learning by doing
At Tranquility Base via NASA https://t.co/5T8xF3oA8p pic.twitter.com/ZG9qloyL6P
— martinengwicht (@martinengwicht) July 20, 2018
from Twitter https://twitter.com/martinengwicht