What have I learnt in English Unit 9

I have learnt that the scienctists are planning on making Mars a place to live for the future people.The people living there would enjoy the effects of low gravity.People there will have to recycle the air with an equipment.They will also have to keep the air from escaping.The first colony to Mars will be the robots.The people travelling to Mars will live in the spacecraft that brought them there.The people will then live in inflatable houses in underground cities.They will have to grow food in greenhouses through moon dust.There are alot more information but I can't list everything.