"Follow me" said the #ocean to the #atmosphere. "No, you follow me!" replied immediately the atmosphere… So who's acting upon whom? See full video here: https://t.co/0WXv5ivcLd @esa @esaclimate@EUClimateAction pic.twitter.com/wCvvQAPnaM — […]

An experiment on @space_station using transparent materials will shed light on how metal casting works in the quest for the perfect #alloy https://t.co/pNoWFLl3Vd pic.twitter.com/w16JoAUtQW — ESA (@esa) January 9, 2018

Good question! there's a great explanation here: https://t.co/kM23oEbs7q — ESA (@esa) January 9, 2018

We'll pass the picture with Hayden on to Ulf Merbold with your message, thanks for sending — ESA (@esa) January 9, 2018

From Ulf Merbold: "In my years as an ESA astronaut, the person I admired most was #JohnYoung. His accomplishments make him unique among space fliers. I had the privilege to […]