How do kangaroos breathe while they hop?

If you hop like a kangaroo, you might be able feel the air being pushed out of your lungs. Here's why it happens and why it matters.

Investigation to combat muscular atrophy with implantable device

Extended spaceflight takes a toll on many systems within the human body, including the musculoskeletal system. An investigation aboard the International Space Station will examine a drug compound and drug delivery system ...