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The stories behind the world's famous records: how the biggest, fastest, oldest, and most extreme titles are set, tracked, contested, and passed on.

The rulebook behind the wow: how records are defined, measured, evidenced, and recognized — and why some are disputed, revised, or retired.

Nature's record holders: the fastest and largest animals, the oldest living things, the rarest species, and the extremes of weather and space.

The planet at its limits: the deepest trenches, highest peaks, driest deserts, and remotest islands — and how those extremes are measured.

Records of value: the most expensive art, collectibles, and structures ever sold or built — and how price records are documented and compared.