Why is space dangerous for humans?

Space is dangerous for humans due to several factors, including exposure to high levels of cosmic radiation, which can increase cancer risk and harm the body's cells. The vacuum of space poses a threat, as a lack of oxygen can lead to asphyxiation and ebullism, where bodily fluids vaporize in low pressure. Additionally, the extreme temperatures and potential for micrometeoroid impacts can cause severe injury or death. Lastly, the isolation and confinement of space missions can take a toll on mental health.