Smell is one of the strongest senses in association with memories. The brain is made up of many different regions, memories are stored in separate sections dependant on what is being processed (eg. visual, touch, taste, smell). When you are processing scent is goes through a part of the brain called the Olfactory Bulb which is very close to the Limbic System, in this system is the hippocampus (responsible for majority of memory) and the amygdala (responsible for regulating emotion). It's theorised that this increases the strength of the neuron connections involved with scent when the memory is being stored. Scent is also one of the only senses that is very difficult to manipulate, you know what popcorn smells like, you can't really change the scent of that one thing so when you smell it again it's easy for your brain to pinpoint that smell and therefore that memory.

smart paris is smart
thanku :D

All g

Your smell brain is close to your remember brain.

I love this summary a lot more ^^^

Yup. @parisqueen and @unklerhan have both knocked it put before I got here. But that’s the sum of it. The olfactory processors of the brain are close to the amygdala and other regions of the brain associated with memory. The working theory is the proximity causes the strong relationship between scent and memory. A small scale study showed elevated activity in the amygdala and parahippocampal gyrus in test subjects exposed to smells that had a link to memories for them. There have been other studies that show that men and women, or at least brain structures more commonly related to the hormonal make up of developing men and women, may also have different levels of sensitivity to smell memory. Unrelated studies on sense also indicate women and men in general tend to smell certain things more or less intensely and respond to certain types of smells differently. It’s mostly theory of course- but all very interesting, and the best summation is @unklethan.

IVE GOT MORE THAN ONE BRAIN?

many small brain part make up big brain

that reminds me of an example death description for demons in one of the old 3.5 Fiendish Codices where when a specific demon dies it breaks apart into a bunch of smaller demons that run away

Many small demon make up big brain

^^^^^
Science, and a little philosophy. This dude is on a roll.

@unklethan Truly a genius, what don't you know?

Thing I don't know is not thing in brain

Nothing revives the past so completely as a smell that was once associated with it.
-Vladimir Nabokov