The Burj Khalifa is 160 stories tall. It measures over 2,716 feet tall – or if you think in metric that’s 828 meters. “If you put 450 grown ups stacked on top of each other, that would be the height of the building,” Janny Gedeon says.

Architecture is the science of designing buildings. Architects consider the purpose of the building and what it will be used for and then they design that space.

Square and rectangular buildings are less expensive to build, but architects do like to design buildings in interesting shapes. Check out the Lipstick Building in New York or the Gherkin in London, or the Sydney Opera House.

Tall buildings are more common in cities because they allow more people to live in a smaller space. They have to build vertically to fit more people in a small area. “The footing, the space that the building takes is not that big, so they have to build up,” Janny says. The footing is like your footprint, the amount of space you take on the ground. Manhattan is built on a very strong rock, so it can support those tall buildings.

Buildings stay up in much the same way humans stay up. There are footings--think of them like feet--that go into the ground. Buildings have a skeleton, called a structural frame, kind of like bones in a human. And on the outside, they have a cladding, aluminum or glass or other materials, kind of like our skin.

Wind is a big consideration for architects building tall buildings. They design the buildings to sway. If buildings are too brittle they will break, they are designed to sway. Most skyscrapers get narrower toward the top. In earthquake prone areas, buildings sometimes have footings on a track so they can move.