Oct. 4, 1957 – Sputnik, the Dawn of the Space Age via NASA https://t.co/FgE1r4fl8i http://pic.twitter.com/OqJx0cvhA8
— martinengwicht (@martinengwicht) October 4, 2017
from Twitter https://twitter.com/martinengwicht
learning by doing
Oct. 4, 1957 – Sputnik, the Dawn of the Space Age via NASA https://t.co/FgE1r4fl8i http://pic.twitter.com/OqJx0cvhA8
— martinengwicht (@martinengwicht) October 4, 2017
from Twitter https://twitter.com/martinengwicht