system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do humans not remember being babies?
gpt
infants do form memories. But they forget quickly:

* 6 month => 24h retention
* 9 month => 1 month retention
* 20 month => 1 year retention

So human (babies) remember being babies. But human (adults) dont remember beeing babies. 

Baby brains grow fast. From birth to the age of 2 they triple in size.  During this change in size, neurons grow, they test connections and prune themselves. The part of the brain "responsible" for storing memories of events keeps making new neurons fast, even far into adulthood (but much slower). by forming new connections with memory circuits, the masses of new neurons may disrupt existing networks of already-formed memories. So babies learn fast, and they forget fast.