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Subject: Scientist
cientists in space have another way to experiment: on them-
selves. Astronauts are monitored in many ways so that experts
back on Earth can track their health. They keep track of their heart
rates, blood pressure, eating habits, and sleeping patterns. They are
carefully measured before, during, and after their visits to space to
better understand how being in space affects a person.
One thing that has been learned during the years humans have
been going to space is the importance of exercise.When a person goes
into space for a long time, their muscles and bones do not grow the
The only way to safely handle fire on board the ISS is by the use of the glove box. Here an astronaut
with his arms in protective black gloves studies how flame behaves in zero gravity.