What Can Astronaut Spit Tell Us?

What can astronauts’ saliva tell us about the innerworkings of the human body during spaceflight? Aboard the International Space Station, NASA astronaut Jonny Kim demonstrates how a small task—like collecting saliva samples—can provide big insights, keeping crews healthy as we prepare for missions to the Moon and beyond. Learn more about NASA’s Human Research Program: www.nasa.gov/hrp Credit: NASA Join NASA as we go forward to the Moon and on to Mars -- discover the latest on Earth, the Solar System and beyond with a weekly update in your inbox. Subscribe at: https://www.nasa.gov/subscribe