A scientist and a former astronaut told a Senate panel June 6 that the medical consequences of long-duration space travel are not well understood and proposed cuts to NASA's life science budget will leave crucial questions unanswered as the agency tries to send people back to the moon and on to Mars. "Simply put, the biological risks associated with exploration-class spaceflight are far from being mitigated," said James Pawelczyk, associate professor of physiology and kinesiology at ...


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