HRP-4C, a five-foot humanoid robot developed at Japan's National Institute of Advanced Industrial Science and Technology, sings and dances with performers at the Digital Contents Expo in Tokyo on October 17, 2010. The robot runs entertainment software called Choreonoid, a name formed from the words “choreograph” and “humanoid”. (Yoshikazu Tsuno/AFP)

These girls are all smiles as they celebrate surviving A-level results day in Birmingham, England on August 15, 2019. The A Level is a subject-based qualification conferred as part of the General Certificate of Education, as well as a school leaving qualification offered by the educational bodies in the United Kingdom. (Photo by SnapperSK/SnapperMS)

The 139-year-old Victorian house known as the Englander House is hoisted on a flat bed and pulled down Franklin Street towards its new location six blocks away, as the original site is to be used to build a 48-unit, eight-story apartment building, in San Francisco, California, U.S. February 21, 2021. (Photo by Brittany Hosea-Small/Reuters)

A Darjeeling Himalayan Railway steam train, which runs on a 2 foot gauge railway and is a UNESCO World Heritage Site, passes by a market in Ghum, India, June 27, 2019. (Photo by Ranita Roy/Reuters)

A fruit importer's lorry at Covent Garden, London, with its driver's cabin in the shape of an apple. (Photo by Harold Clements/London Express/Getty Images). October 1928

SpaceX, the space transportation company built from scratch by visionary billionaire Elon Musk, has the grand goal of space travel evolution through the use of re-usable rockets. Its technology – which has proven its worth several times – can reduce the costs of space transportation to its fraction, making it a more affordable way of reaching orbit or traveling beyond.

A Leyland lorry during the railway strike, “we supply both milk and baby” is chalked on the bonnet. (Photo by A. R. Coster/Topical Press Agency/Getty Images). 3rd October 1919

A soldier from the African Union (AU) peacekeeping force stands guard at the site where a cargo plane carrying supplies for AU troops crash-landed outside Somalia's capital, on October 13, 2015 at Abirska, some 18 kilometres outside Somalian capital, Mogadishu. The officials said the Egyptian-owned transport plane went down after making several unsuccessful passes over the seafront airport. Two of the six crew members suffered light injuries in the crash, the officials said, but added that the plane and those on board were safe having landed in an area controlled by the Somali government and the African Union's AMISOM force. (Photo by Mohamed Abdiwahab/AFP Photo)