Let's get into the brain. Let's get into the brain fact of today.

So the brain fact of today is all about smell and why your sense of

smell is the strongest sense for triggering a memory. Okay. So I think we can all relate to this

where you've smelled something that's brought you back to either a childhood memory or you've

walked past someone on the street and you've smelled a cologne that you forgot existed, but it reminds you of a person that maybe you worked with or someone that you shagged

or dated. These really, really strong, accurate emotions that get brought up because of smell and

why that is the case and why it is so stronger than your other senses for triggering a memory.

Okay.

Now, the reason that I decided to do this brain fact is because on my first day in Paris,

I was with my parents and we're walking through Paris and there's on the streets,

there's these big kind of grates that you walk over.

And I think this is not just in Paris.

I think they have this in New York as well.

Any city that has a metro system, an underground system of sorts,

so London as well.

But we're walking over this great and it's like a vent for the metro system.

So this smell comes up from the metro and it's a very like, I don't know,

it's a mix between like oil and metal and I don't know, it's a mix between like oil and

metal and I don't know. It's like a very particular smell. It's not an unpleasant smell.

It's just a particular metro smell and it's different in London. It's different in New York. It's

specific to the metro and I smelt it and I was about to say oh wow I haven't smelt this in

ages and it's brought me back to the first time I was in Paris and my dad says straight

...