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HomeNewsThe Burj Khalifa, the tallest building in the world, is so tall...

The Burj Khalifa, the tallest building in the world, is so tall that people perceive time differently from the top and bottom floors

  • Standing at 2,716.5 feet, Dubai’s Burj Khalifa is the tallest building in the world.
  • It’s so tall that people on the top and bottom of the building have a different read of time.
  • The building “transcends the earth’s local temperature and climate,” author Stefan Al wrote in his new book, “Supertall.”

People on the upper floors of the Burj Khalifa, the world’s tallest building, perceive time differently than do those on lower levels.

In a new book called “Supertall,” architect Stefan Al explored the world of skyscrapers and how they affect the way we live, including the impact the world’s tallest building has on its inhabitants.

At 828 meters tall, or 2,716.5 feet, the Burj Khalifa is twice the height of the Empire State Building. It far exceeds the scale of anything that’s been built on Earth, Al wrote.

“I remember first going there, and I had this old camera phone — I couldn’t even fit it in one single shot. I thought that’s so bizarre that you can’t even fit a building in your camera lens,” Al told Insider.

From the top of the Burj, people can view so far into the Arabian Desert that they see the sun set several minutes after people on the ground see it set, per Al’s book. It’s had implications for the Muslim population in the building: As a result of the perceived time difference, those living on the higher floors of the Burj need to wait a few extra minutes before breaking their fast at sunset.

“Dubai clerics decided that the residents above the 80th floor should wait an additional two minutes to end their Ramadan fasting. And those above the 150th should wait an additional three,” Al wrote in his book.

The Burj Khalifa emerges high above the clouds in Dubai.

Standing at 828 meters (2,716.5 feet) tall, the Burj Khalifa emerges high above the clouds in Dubai.
Rustam Azmi/Getty Images

The building also “transcends the earth’s local temperature and climate,” Al wrote. That’s because the Burj is so tall that its upper half occasionally emerges above the clouds, rendering it unaffected by the rain that’s pouring at its base.

At the top of the building, the temperature on the outside is also thought to be 11 degrees Fahrenheit (6°C) cooler than on the ground, per the book.

“Since the air gets cooler the higher you go, you can take advantage of that height difference by having less air conditioning on the upper levels, because you can use that cooler air as intake,” Al told Insider.

Supertall” was released on April 12, under the publisher W. W. Norton & Company.