system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do we never see clouds form, and why do they always appear to be at the same height?
gpt
Cloud formation is relatively slow; if you're not staring at the sky and paying careful attention, you won't notice a cloud growing larger (or smaller, for that matter).

Clouds are generally pretty far away, so they look like they're all around the same height. But I've definitely seen clouds that are well above/below another set of clouds. It's just that there aren't many reference points in the sky for you to regularly notice that the clouds today are higher/lower than the clouds yesterday.