Tuesday, 20 November 2012


The blog Of Katrina,Irene

 

as well as given humanity some of its greatest achievements, such as walking on the moon. However, some people argue that the negatives outweigh the positives when considering the high costs and potential loss of human life.

 

Living in space
Living in space is not the same as living on Earth. In space, astronauts' bodies change. On Earth, our lower body and legs carry our weight. This helps keep our bones and muscles strong. In space, astronauts float. They do not use their legs much. Their lower backs begin to lose strength. Their leg muscles do too. The bones begin to get weak and thin. This is very bad for astronauts' bodies. So, how do astronauts help their muscles and bones? They must exercise in space every day.


 

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