The world's biggest iceberg — a wall of ice the size of Rhode Island — is lumbering toward a remote island off Antarctica that's home to millions of penguins and seals.

Courtesy of Catalina Shirley Catalina Shirley, 22, pictured maneuvering a climbing wall that’s been turned into a simulated wall of ice. Shirley, of Denver, will compete in the upcoming 2025 Ice ...