system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why have we not landed on the moon recently when advances in technology should make it cheaper, safer, and easier?
gpt
It's still really, really, expensive. And the moon itself isn't all that interesting for someone to land on, we can do some great research without sending folks there. Lots of other stuff in the galaxy are more interesting right now, like Mars, so we are focusing there.