Former NASA astronaut Jeffrey Hoffman discusses the challenges of inducing an atmosphere on Mars. Aeon Video: http://ow.ly/DzdE306Oabz pic.twitter.com/bnHnuXwAxT
5:00 PM - 5 Dec 2016
0 replies
3 retweets
8 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.