(MUSIC)

JOAN CARTAN-HANSEN,

HOST: HANGING OUT IN THE

MICRO-GRAVITY OF SPACE IS PART

OF AN ASTRONAUT'S JOB, BUT IT'S

TOUGH ON THE HUMAN BODY.

WITHOUT GRAVITY'S PULL,

ASTRONAUTS BONES AND MUSCLES

WEAKEN.

ASTRONAUTS' SENSE OF UP AND DOWN

GET CONFUSED SO THEY CAN GET

DIZZY OR NAUSEOUS EVEN

DISORIENTED.

DOCTORS HAVE EVEN FOUND THAT THE

PRESSURE INSIDE AN ASTRONAUT'S

EYES CHANGES IN SPACE.

SO WHAT CAN AN ASTRONAUT DO?

SPACE CRAFT DESIGNERS ON THE

INTERNATIONAL SPACE STATION HAVE

WRITING ON THE WALLS POINTING IN

THE SAME DIRECTION TO HELP

ASTRONAUTS FIGURE OUT WHERE THEY

ARE.

AND ASTRONAUTS EXERCISE HOURS

EACH DAY TO WORK THEIR BONES AND

MUSCLES.

EVEN WITH THAT, IT CAN TAKE

MONTHS OF REHABILITATION FOR AN

ASTRONAUT TO RECOVER AFTER ONLY

SIX MONTHS IN SPACE.

SO, WEIGHTLESSNESS MAY LOOK LIKE

FUN...BUT THE HUMAN BODY NEEDS

GRAVITY TO STAY HEALTHY.

FOR MORE INFORMATION ABOUT

GRAVITY, CHECK OUT THE SCIENCE

TREK WEBSITE.

YOU'LL FIND IT AT

IDAHOPTV.ORG/SCIENCE TREK