China's youngest-ever crew of astronauts heads to space station

China's youngest-ever crew of astronauts, known as taikonauts, have launched to the country's space station. The three-person crew, led by former air force pilot Tang Hongbo, will spend six months on the space station. Tang's return to space sets a new record for the shortest interval between spaceflight missions by taikonauts, suggesting a faster rotation of astronauts in the future. China has already begun selecting candidates for its fourth batch of astronauts, including applicants from Hong Kong and Macau for the first time.