Original reading passage
At an astronomy evening, students discussed what humans would need to live on another planet. The speaker named breathable air, a suitable temperature, liquid water, and a reliable source of food. A planet’s size or bright colour alone could not show that people could live there safely. The group used Mars as an example of a world that would require life-support systems: its atmosphere is very thin and is not suitable for humans to breathe. Students asked how a shelter could provide air and protect its occupants. They then drew fictional habitats and labelled the invented features clearly. Their teacher praised careful questions, not claims that a drawing proved another world was ready for human settlement.