system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is everything so much scarier at night, even ordinary stuff?
gpt
Humans evolved to be scared to venture out away from the group and fire at night. Humans have terrible night vision, and when we were evolving basic instincts we could easily be ambushed in night by predators. Those who were too scared to leave the safety of the group were more likely to survive and reproduce.