What if you could take an elevator up to the International Space Station as easily as going to the top floor of a skyscraper? A major Japanese construction company has announced plans to complete a "space elevator" by 2050. It will travel at a speed of 200 km per hour and be able to reach geostationary orbit in a week. The cable will be made with carbon nanotubes, which are said to be the strongest fibers on Earth. If completed, it will make space more accessible and boost space development.