Answer
Humans can live in space, as demonstrated by Titov's flight. Titov became the second human to orbit Earth in 1961, spending 25 hours in space. His mission proved that humans could withstand the physical and psychological challenges of space travel, including weightlessness, radiation exposure, and isolation. Titov's flight paved the way for longer and more complex space missions, ultimately leading to the first human landing on the Moon in 1969.