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The final frontier has it's own apartment complex. The International Space Station, the biggest object ever flown in space, houses any astronaut spending a significant time outside the earth's orbit. It has been home to more than 200 visitors and is so big that it can sometime be spotted from Earth during night time, flying 320 kilometers above us. It travels around the Earth at an average speed of 27,700 km/h, completing 16 orbits per day.

Being the only habitat in space, astronauts from many countries live and research at the station, and sometimes, have to spend months on the space station. Sometimes that can be a fascinating task, but it can also be difficult, because space turns even the simplest activities into major challenges. These videos give you some idea of just what it's like to live in a world outside our own. It might be easy for earthlings to simply wake up in the morning and brush their teeth, but in space, it’s a difficult task, as the video above shows. Because there is no gravity outside and inside the station, everything floats. That means, even if you manage to brush your teeth, you might have to swallow the froth left after brushing.

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Here, Sunita Williams takes you on a fascinating tour of the International Space Station's orbital laboratory, where the most interesting space experiments happen.

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Inside the space station, every day is a bad hair day. That means, no matter how many times, one brushes the hair, the hair floats and is always standing perpendicular. So, how does astronaut clean their hair? Here is a video of an astronaut, Karen Nyberg, demonstrating how to keep your hair clean inside the station

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Astronauts also make sure they stay healthy while they are working inside the station for months. But running in a place where your foot hardly sets on ground sounds impossible, but here is a video which shows how astronauts run and jog on a treadmill inside the station.