did-you-kno: Ancient Persian engineers made their own freezers that kept ice cold - even during desert summers. By 400 BCE, they had perfected the ‘yakhchal,’ which are made of thick, heat-resistant materials. They had vents to funnel breezes to

did-you-kno: Ancient Persian engineers made their own freezers that kept ice cold - even during desert summers. By 400 BCE, they had perfected the ‘yakhchal,’ which are made of thick, heat-resistant materials. They had vents to funnel breezes to

tags: So many OTPs,

from: https://eikuuhyo.tumblr.com/post/174730366505