Yazd, an ancient city in Iran's desert, is known for its tall wind catchers that provide natural cooling without electricity or emissions. ...

The ancient Persian city of Yazd has developed engineering marvels, such as wind catchers known as badgirs, to stay cool in summer temperat...

The discovery of liquid water on Mars is great news for would-be settlers, but we'll need more than H2O if we actually want to live there.