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

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.

Idenitcal twins Scott, right, and Mark Kelly were the test subjects for a NASA study on how long periods of spaceflight affect the human body, with Mark on Earth while Scott spent almost a year in the ...

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 ...