Add Yahoo as a preferred source to see more of our stories on Google. Aghazadeh Mansion, a national historic site in Iran, was built with elaborate wind towers and other natural cooling techniques.

Consider this, if you would: a network of far-flung, powerful, high-tech civilizations closely tied by trade and diplomatic embassies; an accelerating threat of climate change and its pressure on food ...

GameSpot may get a commission from retail offers. At the start of a playthrough in Civilization VII, you only have access to some basic military infantry units. These units can't move very far each ...