How could people possibly survive on Mars? Won't radiation fry their brains? How would children develop? These general questions are why I am writing a technical, specific book outlining the principles of biological and cultural adaptation that will allow our species to explore beyond Earth, and live beyond Earth, escaping the extinction trap that Earth has been for 99% of all known life to date. So here is one recent diagram not generalizing but saying very specifically what we can expect in one instance, the development of standing and walking among Mars children. On that planet, gravity has about 1/3 the 'strength' of Earth's and yes, children will develop different physiques and even different habitual gaits to walking and running and they will even express themselves, with body language, slightly differently than Earth people. A slow differentiation, both biological and cultural, will start with the earliest generations on that planet.