What caracteristics of a planet would prevent or slow down an aliens species to access space for the first time ?

For example, a planet bigger and heavier than ours, with a bigger gravity, not allowing the kind of rockets we use to get out of the atmosphere. We would probably have the same land thechnology, but no satellites at all, and would slow us down a lot.

Or a planet fully covered in water. Would be probably hard to discover fire (and maybe no oxygen in the atmosphere ?)

What other examples you guys can think of ?

Submitted October 26, 2022 at 07:44AM by FluffPudd16 https://ift.tt/jJxEHw9