Over the past few years, improvements in building materials and methods have seen buildings grow ever higher. And with a greater understanding of aerodynamics, the sky really is the limit when it comes to building mega-tall skyscrapers.

There are already plenty of impressive structures around the world, showcasing the talents of architects and structural engineers who have built these incredible buildings that defy gravity.

Many more are in the planning or construction phase, such as the Jeddah Tower in Saudi Arabia, which has been designed to reach over 1000m in height once completed. The Bionic Tower, a design proposal for a vertical city in China, would reach the dizzy height of 1,228m if constructed.

But, for now at least, here are the 10 biggest skyscrapers in the world.

Keep reading on sciencefocus.com