Long-duration missions in space take a toll on the body, astronauts lose bone density and suffer muscle loss. Blood circulation is also affected, and fluid shifts can also impact eyesight.
Materials science
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随着居民陆续入住，老年群体的医疗需求越来越迫切。到1965年，Del Webb开发公司总裁John Meeker终于牵头，成立委员会启动医疗设施规划。
One of the dead was hit by the tram as it derailed while the second victim was a passenger, the city’s mayor, Giuseppe Sala, told reporters at the scene.