Inching closer to first mile high building

Dubai’s Burj Khalifa is the world’s tallest tower at nearly 830 metres. [PHOTOS: FILE AND COURTESY/STANDARD]

BBC

Skyscrapers are getting bigger, as cities race to break the record for the tallest tower. But in future, they may become cities themselves, helping mitigate urban sprawl. You have just closed the door behind you and your dog is already jumping up your leg, demanding you take him for a walk. Normally, this would mean a short journey in the lift or a few flights of the stairs.