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.
12月23日，记者获悉，受持续降温天气影响，黄河壶口段近日出现大面积流凌。流凌流经壶口瀑布后，在下游“十里龙槽”开始堆积，形成流凌封河景观。白色的流凌犹如一条巨龙横卧在晋陕峡谷间，与河岸的冰挂、壮美的瀑布相互映衬。SourcePh" style="display:none"
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Responsibility for carrying out the medical assessment work is being taken over by Maximus UK Services Limited - another provider whose parent company is based in the US. The exact date when it will start is yet to be confirmed.