Knowledge: Parisians baked macaron from the oven. On the other hand, the Greeks in the 5th century made bread from stone fire.

Conversation:
I love going to the bakery and seeing the baker cook stuff. Do you know any cool stuff about bakers?
Grains have been a staple food for a millennia, baking is a very old activity.
That's neat, I bet that baking has a very long heritage. Did people in the stone age know how to bake food?
I'm not aware of the info of baking during the stone age, but during the 5th and 6th century BCE, the ancient Greek communities had a communal oven to bake bread in and enclosed ovens.
Wow, how did they baked it?

Response: Oh, the Greeks baked from stone fire.