New research suggests even brief forays into space can weaken the immune systems of astronauts. 

During the final flight of the US space shuttle Atlantis in the summer of 2011, one of the most important pieces of scientific cargo on board was a medical experiment designed to test how the human immune system responds to stress and disease in the microgravity conditions of Earth orbit.

The experiment contained samples of living human cells housed in a sterile, temperature-controlled … [Read More]

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Source: VOA News: Economy and Finance