Joseph M. Acaba
@AstroAcaba
NASA astronaut on my 3rd spaceflight. US Marine Corps, Reserve -hydro geologist -peace corps volunteer -and my favorite job, math and science teacher.
15-07-2011 21:33:33
249 Tweets
43,7K Followers
35 Following
It is extremely helpful! A big part of the International Space Station is helping to design life support systems that we will use going to Mars, and learning how the human body reacts to a microgravity environment. twitter.com/Astro_ManishKr…