[Taraz]

[ QUOTE ]
Chemically/physically what is thinking/memories? Like how does the brain hold memories?

[/ QUOTE ]

We don't really know. It's a really, really complex issue.

[ QUOTE ]
Is it chemical balances or what?

[/ QUOTE ]

I'm not sure what that means, but a memory is basically a specific pattern of neurons firing in your brain. Often, it is your brain recreating the conditions that were present at the time the memory was formed. So parts of your visual system actually fire when you try to remember an image.

[ QUOTE ]
I was wondering to myself if there is a physical limit on how many memories a person could have in their brain and it made me wonder what the memory mechanism is

[/ QUOTE ]

This is a tough question. There probably is on some level, but this is another unanswered question.