Space travel still sounds like just about the coolest thing ever, even though we have learned that it brings with it nausea, sleeplessness, radiation exposure, muscle loss, vision changes, cranky fellow explorers and the challenge of going to the bathroom in zero gravity. And that’s just with the “easy” stuff, like living on the International Space Station. Let’s not even get started on a possible mission to Mars (SN: 11/29/14, p. 22).
Fortunately, we have robot friends out exploring the cosmos for us.