St. Vincent performs at the Coachella Valley Music and Arts Festival in Indio, California, U.S., April 13, 201. (Photo by Mario Anzuoni/Reuters)

The town hall with the Mangia tower is seen in Siena, central Italy, January 29, 2016. (Photo by Max Rossi/Reuters)

A model presents a creation by Irene Luft during the Berlin Fashion Week Autumn/Winter 2019/20 in Berlin, Germany, January 15, 2019. (Photo by Fabrizio Bensch/Reuters)

Brazilian fashion modell Gisele Bundchen on March 9, 2023 teases for Brazilian footwear brand Arezzo's Winter 2023 campaign. The newly-divorced 42-year-old transforms into a blonde bombshell in these striking images to promote the sassy collection by creative director Giovanni Bianco. (Photo by Arezzo/The Mega Agency)

A dog belonging to the Armed Police Force jumps through a ring of fire while performing a trick during Kukur Tihar as part of Tihar, a term used in Nepal for Diwali, in Kathmandu, Nepal, on October 20, 2025. (Photo by Navesh Chitrakar/Reuters)

Sweden's Henrik Pilerud, inside the Totoro costume, and his team member Victoria Christensen (R) pose during an interview with AFP ahead of a rehearsal before the world cosplay championship 2024 during the World Cosplay Summit in Nagoya on August 3, 2024. (Photo by Philip Fong/AFP Photo)

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.