"Exploring the Fascinating World of Two Feet"

Rebecca Goldstein and Rafael Musa, both regular crossword constructors, collaborated on a Sunday crossword puzzle with an ambitious theme. The puzzle features pairs of stacked entries that share a four-letter run, creating a visual effect in the grid. The theme revolves around footwear, with entries like "HEEL" and "CLOG." The revealer, "BIG SHOES TO FILL," emphasizes the size of the theme entries. The constructors used coding skills to help fill the grid and added fun bonus fill.