Why Dubai Skyscrapers Are Not Sinking In The Sand

The tallest building in the world is Burj Khalifa - a skyscraper situated in Dubai. It was build right on sand! Why doesn't it sink into it? Actually the whole Dubai was built on the edge of a desert and yet it's home to over 200 skyscrapers. Let's see how skyscrapers are built in deserts and what keeps them stable and strong.