Expedition 74 studied the cardiovascular system and prepared for an upcoming spacewalk today. @NorthropGrumman's Cygnus XL spacecraft will also depart the station on Thursday. nasa.gov/blogs/spacesta…

@Space_Station @northropgrumman Hang in there astronaut friends! Or should I say float!

@Space_Station @northropgrumman Good luck up there, take care and have a nice stay.✨

@Space_Station @northropgrumman It is annoying watching Canadarm2 handle Cygnus XL while our funding evaporates and Dubai recruits our engineers. We should be leading this.

@Space_Station @northropgrumman Bring it down early, and the world saves billions

Pick which twin will win! You could score a share of $2 million in Bonus Bets.