system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do all mammal infants sleep 90% of the time, yet human spawn screeches for hours on end at night?
gpt
There is a hypothesis (I am not sure it is enough to be a theory) that infants cry at night in order to keep the parents tired enough that they are less likely to have sex and therefore get pregnant again too soon.