The space race is back on – but who will win?

Liu Boming took in the dizzy view. Around him lay the inky vastness of space. Over the next seven hours Liu and his colleague Tang Hongbo carried out China's second spacewalk, helped along by a giant robotic arm. Mission accomplished, the two taikonauts – China's astronauts – clambered back into their home for the next three months: Beijing's new space station. The core module of the station, named Tiangong, meaning "heavenly palace", was launched in April.