One of Japan's biggest construction companies hopes to build a space elevator by 2050 using carbon nanotube technology.

Japanese engineering giant Obayashi believes the construction of such an elevator could soon become feasible as a result ongoing advances in carbon nanotechnology. Obayashi, one of Japan’s big five civil engineering and construction firms, says the elevator it plans to build will extend 96,000 kilometres from the surface of the earth into space. The…