How does an astronaut take a selfie?

NASA has released some of its most impressive images from its Mars rover Curiosity and its exploration of the Red Planet in an attempt to answer the question: How do you take a picture of Mars?NASA scientists spent weeks trying to figure out how to capture images of Mars from the air, and it turns out they have to be a bit of a pain in the ass.Here's how it works.NASA scientists have been able to...