China sends its youngest astronaut and four black mice to space station

China’s Shenzhou-21 space rocket and its crew including the youngest member of its astronaut corps blasted off on Friday atop a Long March-2F rocket from the Jiuquan Satellite Launch Centre in northwest China, CNN reported, citing Chinese state media.

It was the seventh mission to the permanently inhabited Chinese space station since it was completed in 2022.

Missions on China’s Shenzhou-21 spacecraft involve trios of astronauts on six-month stays in space, with veteran astronauts increasingly replaced by younger faces. First-timers Zhang Hongzhang, 39, and Wu Fei, 32 - China’s youngest astronaut to be sent to space - were picked to participate in the program in 2020.

Commander Zhang Lu, 48, flew on the 2022 Shenzhou-15 mission.

The Shenzhou-21 astronauts will take over from the Shenzhou-20 crew who had lived and worked on board Tiangong, or “Heavenly Palace,” for more than six months. The Shenzhou-20 astronauts will return to Earth in the coming days.

The Shenzhou-21 crew were also joined by four black mice, the first small mammals to be taken to the Chinese space station. The mice will be used in experiments on reproduction in low Earth orbit.