In my setting humanity is setting out to colonize space with very advance terraforming technology. A group of colonizers has terraformed a planet to be habitable for humans. But an accident happens and they lose all their advance technology. Ten thousand years later another group of human arrived at this planet and found out that all humans there are crawling instead of walking. What sort of environment cause them to have this adaptation? About the crawling humans:
- They crawl as a main method of locomotion. They can still stand on 2 legs but only for short amount of time like bears.
- Their technology is only at tribal level and only lives in a small area of the planet with a population less than 50,000.
- Any additional adaptation is fine.
The planet itself is terraformed and contains breathable atmosphere, liquid water, and is populated with plants and animals for food. Other than that it can be any way.
The enviromental factors needed to be specified:
- What type of planet is it. The composition, temperature, atmosphere, gravity, moons, or type of star it orbits etc. Anything that would have an effect in causing humans to adapt to crawling.
- The biome that they live in. Would the crawling people be living in plains, jungles, mountains, islands, etc.
- Other enviromental factors. A predator or natural disasters they have to avoid or a food and resources they have to collect that might favor them to crawl instead of walk.