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(MUSIC)

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JOAN CARTAN-HANSEN,

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HOST: HANGING OUT IN THE

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MICRO-GRAVITY OF SPACE IS PART

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OF AN ASTRONAUT'S JOB, BUT IT'S

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TOUGH ON THE HUMAN BODY.

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WITHOUT GRAVITY'S PULL,

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ASTRONAUTS BONES AND MUSCLES

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WEAKEN.

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ASTRONAUTS' SENSE OF UP AND DOWN

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GET CONFUSED SO THEY CAN GET

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DIZZY OR NAUSEOUS EVEN

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DISORIENTED.

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DOCTORS HAVE EVEN FOUND THAT THE

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PRESSURE INSIDE AN ASTRONAUT'S

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EYES CHANGES IN SPACE.

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SO WHAT CAN AN ASTRONAUT DO?

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SPACE CRAFT DESIGNERS ON THE

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INTERNATIONAL SPACE STATION HAVE

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WRITING ON THE WALLS POINTING IN

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THE SAME DIRECTION TO HELP

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ASTRONAUTS FIGURE OUT WHERE THEY

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ARE.

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AND ASTRONAUTS EXERCISE HOURS

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EACH DAY TO WORK THEIR BONES AND

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MUSCLES.

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EVEN WITH THAT, IT CAN TAKE

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MONTHS OF REHABILITATION FOR AN

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ASTRONAUT TO RECOVER AFTER ONLY

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SIX MONTHS IN SPACE.

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SO, WEIGHTLESSNESS MAY LOOK LIKE

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FUN...BUT THE HUMAN BODY NEEDS

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GRAVITY TO STAY HEALTHY.

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FOR MORE INFORMATION ABOUT

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GRAVITY, CHECK OUT THE SCIENCE

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TREK WEBSITE.

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YOU'LL FIND IT AT

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IDAHOPTV.ORG/SCIENCE TREK