For example, Wakata will monitor the development of cells that develop into kidneys of frogs. The cells will be frozen in the middle of the cultivation process and brought back to the Earth for genetic analysis.

He will conduct a similar study on cells that develop into livers.

In zero gravity conditions, it has been found that the bone density of humans deteriorates about 10 times faster than that of osteoporosis patients on Earth—even if they exercise for two hours each day.

As a result, astronauts are more likely to suffer from bone fractures.

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