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Mathematics competitions are events where individuals or teams solve mathematical problems within a specified time frame. These competitions can vary in format, difficulty, and scope, and they are designed to challenge participants’ mathematical understanding, problem-solving abilities, and creativity. They can range from local and regional contests to national and international level competitions.

The "Nutshell Studies of Unexplained Death" is a collection of dioramas created by Frances Glessner Lee in the 1940s. Glessner Lee was a pioneer in forensic science who aimed to improve the training of homicide investigators. The dioramas are incredibly detailed miniature scenes that depict various murder mysteries and unexplained deaths. Each diorama is designed to present a different set of circumstances surrounding a fictional death, complete with realistic props and meticulous attention to detail.