00:00How do you build a human home in space?
00:03That's what we did here with the International Space Station.
00:05It's a six-bedroom house the size of a soccer field with a gym orbiting 400 kilometers up.
00:11Russia built the first piece on Earth and then shot it up nearly 30 years ago on this huge rocket.
00:15Other countries built their own pieces, and as they sent them up, astronauts connected them like massive Legos.
00:21Sometimes they used this giant robotic arm or manually had to hook them together.
00:25And sometimes they needed adapters, like on Earth.
00:28The air on board is brought up from Earth or recycled from astronauts' breath or created by running electricity through water, splitting it into hydrogen and oxygen.
00:36The electricity comes from solar panels, and the water is either brought up in supply ships or recycled from astronauts' pee or breath.
00:42It took 42 rocket launches and over 10 years to assemble 150 pieces of our international home in space.
00:50But it's going to come down in 2031.
00:52To learn how, subscribe.
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