A woman eats candy in the shape of a phallus during the Kanamara Matsuri, or Iron Phallus Festival through a street near the Kanamara shrine in Kawasaki outside of Tokyo April 5, 2015. The festival celebrates fertility and is used to raise awareness and money for the prevention of sexually transmitted diseases. (Photo by Thomas Peter/Reuters)

A coil-shaped Helix Nebula showing a fine web of filamentary “bicycle-spoke” features embedded in the colorful red and blue ring of gas. At 650 light-years away, the Helix is one of the nearest planetary nebulae to Earth. A planetary nebula is the glowing gas around a dying, Sun-like star. (Photo by Reuters/NASA)

Fishermen use traditional cone-shaped nets on Inle lake in Myanmar in February 2022. The men steer their boats with an oar that they control with their feet. They throw the net into the water and push it down so it sinks to the bottom, then drag it back to the surface with the fish trapped inside. (Photo by Alahattin Kanlioglu/Solent News)

Japanese professional wrestler Hiromu Takahashi attends a promotional event of a dinosaur show “Dino Safari Gigant” in Tokyo on Wednesday, August 2, 2023. A dinosaur show using dinosaur shaped mrchanical suits will be performed in Yokohama from August 10. (Photo by Yoshio Tsunoda/AFLO/Rex Features/Shutterstock)

Indian folk artists perform during the “Unboxing Bengaluru Habba” or Bangalore festival, an annual citywide festival held in front of Vidhana Soudha, the State Legislature of Karnataka, in Bangalore, India on December 10, 2023. The Bengaluru festival showcases folk dance and cultural diversity that have shaped Bengaluru into a vibrant metropolis. (Photo by Jagadeesh N.V./EPA/EFE)

The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulfide with the formula FeS2. This mineral's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold. The color has also led to the nicknames brass, brazzle, and Brazil, primarily used to refer to pyrite found in coal.
In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.

This view shows giant hot air balloons of various shapes being lifted to begin flights from the Metropolitan Park over the city of Leon during the 2025 International Balloon Festival (FIG) in the state of Guanajuato, Mexico on November 15, 2025. (Photo by Mario Armas/AFP Photo)

Anastassia Elias spends hours painstakingly cutting out tiny shapes to make detailed models – and then fits them inside used toilet rolls. Elias, 37, uses paper the same color as the cardboard tubes to build up the intricate scenes from wildlife to construction sites. Photo: Toilet paper roll art of African wildlife. (Photo by Anastassia Elias/Caters News)