The answer comes from a counterintuitive result of special relativity, a field of physics which is notoriously difficult to ...

For more than 25 years, humans have lived and worked continuously aboard the International Space Station, conducting research ...

ISS research over 25 years shows how humans adapt biologically, medically, and technologically to space, informing future missions and scientific understanding of life beyond Earth.

Twin brothers and former NASA astronauts Mark and Scott Kelly have each flown four missions and were part of NASA's twin study to research the impact of spaceflight on the human body. Hours before ...

He drew blood from his arms. He saved his urine. He played computer games to test his memory and reaction speed. He measured the shape of his eyes. Two hundred-and-forty miles below, Scott’s twin ...