And...
Do you think the first Europeans walked straight out of Africa and survived the harsh European ice age going on? No/ they adapted, and they advanced in their knowledge. They learned how to build better shelters and make better clothing. They learned how to hunt more efficiently and how to farm.
The human body was not equipped to survive the harsh European winters early man encounter. It was our ability to adapt by using our minds that made it happen. Mars will be no different.
Have faith, my friend. It will happen.