Actor Chantel Jeffries attends the 2018 Billboard Music Awards at MGM Grand Garden Arena on May 20, 2018 in Las Vegas, Nevada. (Photo by Steve Marcus/Reuters)

A person takes a photo of the skyline with the Shard building in the center, at sunset, from Greenwich Park in London, Tuesday, November 24, 2020. (Photo by Yui Mok/PA Wire via AP Photo)

In this Sunday, March 5, 2017, photo, hospitality staff take souvenir photos in front of the Great Hall of the People where the National People's Congress is held in Beijing. (Photo by Andy Wong/AP Photo)

Brazilian supermodel Adriana Lima walks the runway during the 2025 Victoria's Secret Fashion Show in New York City, U.S., October 15, 2025. (Photo by Brendan McDermid/Reuters)

Female members of the Colombian Army take part in the military parade to commemorate Colombia's Independence Day in Bogota on July 20, 2024. (Photo by Alejandro Martinez/AFP Photo)

A Palestinian woman pulls a stroller with children, next to piles of rubble, during a rainy day in Gaza City,on November 25, 2025. (Photo by Mahmoud Issa/Reuters)

“Catch of the Decade”. Can you guess what happened next? Photo location: Katmai National Park, Alaska, USA. (Photo and caption by Aaron Baggenstos/National Geographic Photo Contest)

Bryan Berg was introduced to card-stacking by his grandfather at the age of 8. He is a self-taught artist in all of the techniques he uses today. Berg's freestanding card structures are based on a grid-like arrangement, which Berg tested in a structural engineering lab to support 660 lbs per square foot―using no tape, no glue, no folding, and no tricks.