Touch down! NASA astronaut Christina Koch returned to Earth from the International Space Station (ISS) on Feb 6 near Zhezkazgan, Kazakhstan. She spent 328 days in space, breaking the record for the longest spaceflight in history by a woman. Koch made the most of her first trip to the ISS. Besides staying in space for a record-breaking length (长度) of time, she also conducted (进行) the first all-female spacewalk with fellow (同伴) NASA astronaut Jessica Meir on Oct 18.