I'm thinking of a planet incredibly similar to earth. It's located in a solar system where everything is 1000x bigger than ours.
The sudden turn to this is that humans aren't scaled. The Earth has cats the size of our legs, but on this planet, we're the size of a small unwanted piece of his hair.
We build houses that can sustain us, so we aren't living in houses big enough to hold a thousand people.
To eat, lots of humans come together, hold a seed, plant it over the scale of 2 months and when it creates 5 leaves, they break down the ultra large sprout and split it.
Would it be impractical to live in such places, considering their animals would be wild (no large humans to tame) and could kill hundreds of us at a time on accident.
How could humans adapt on the planet to become normal sized and how could they learn to leave their home planet (note rockets will be small and that a 5cm blade of grass will be 50m tall, so Space could be almost 100,000km away)?