Ice Block Avalanche via NASA https://t.co/VWczZhkjYh pic.twitter.com/UsteUrdt5K
— martinengwicht (@martinengwicht) July 6, 2018
from Twitter https://twitter.com/martinengwicht
learning by doing
Ice Block Avalanche via NASA https://t.co/VWczZhkjYh pic.twitter.com/UsteUrdt5K
— martinengwicht (@martinengwicht) July 6, 2018
from Twitter https://twitter.com/martinengwicht