I'm Kara and I'll talk about Hanok the korean treaditional house.

In the past, Joseon's people thought that they couldn't be near boy or girl when they became 7.

So, they divided like Sarangche and Anche.

Sarangche was for men, and Anche was for women or female.

And most scientific fact is On-dol

If the person cook, it's hot air goes under the room, so the floor of the room gets hotter and hotter!

Lastly the hot air goes out by the chimney.

Isn't that great ?

So, I thought that Joseon's people was very smart  and good for science.