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(Phys.org) —A diverse team of international researchers has found that women with stronger immune systems don't necessarily have prettier faces than women whose immune system is not so strong. In their paper published in the journal Biology Letters, the team describes how they used photographs of women that had been vaccinated against hepatitis B to compare facial beauty.

Even though astronauts receive some general medical training in preparation for a stay aboard the ISS, most of them still aren't medical professionals by any means—and with the inherent difficulties of microgravity and the relatively noisy environment inside the Station, even a simple diagnostic task like listening to a heartbeat can be a challenge.