Tag: eeee!!!

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 an
underground storage area and push
warm air out the top, and ice could be
brought in during winter to use for
making chilled treats in the summer. Source Source 2