We Recreated The Oldest Surviving Globe

Key Concepts

• Martin Behaim's Apple Globe (Erdapfel): The oldest surviving terrestrial globe, completed in 1492.
• Dodcahedral Replica: A geometric model constructed from pentagonal shapes, used to represent the Apple Globe.
• Monopods: A mythical one-legged human race, believed to use their large foot as a sunshade.
• Equivalency Principle (Land vs. Sea Animals): An ancient belief that for every land animal, there must be a corresponding sea animal.
• 2026 Planetary Calendar: A desk calendar included with the replica, showing the relative angular positions of planets for the year 2026.
• Uranus Calculator: A hypothetical device designed to calculate the precise moment Uranus is closest to an observer on Earth.

Martin Behaim's Apple Globe and its Replica

The video discusses a mathematically interesting and practical replica of Martin Behaim's "Apple" globe, the oldest surviving terrestrial globe, finished in 1492. This replica is assembled from pentagonal coasters, forming a dodecahedral shape. A significant detail of the original globe is the absence of the American continents, as it was completed just before Columbus's return to Europe. While earlier globes existed, they have been lost, making Behaim's creation the earliest extant round model of Earth. The original is housed at the Germanisches Nationalmuseum in Nuremberg. The replica highlights the globe's intricate details, such as Japan being depicted off the coast of Northern Africa and Noah's Ark resting on Mount Ararat.

Mythical Creatures and Ancient Beliefs

The transcript delves into the historical belief in "monopods," a mythical race of humans with a single leg and a large foot used as a sunshade. This belief, dating back to ancient Greek times, was partly fueled by the equally ancient notion that for every land animal, there must be an equivalent sea animal, suggesting a principle of balance in nature. It is hypothesized that the remains of certain sharks might have been misinterpreted as evidence for the existence of these one-legged land walkers.

The 2026 Planetary Calendar

The practical replica also includes a desk calendar for 2026, designed to show the relative angular positions of the planets on a day-to-day basis. While daily changes are minimal, the calendar can be used as a flipbook to observe the planets' movements over time. The video notes that Earth completes one orbit in a year, while Saturn's movement is much slower.

A Hypothetical "Uranus Calculator"

The speaker humorously mentions a hypothetical "Uranus calculator" that could determine the exact moment Uranus is closest to an individual based on their location on Earth. This is presented as an example of a complex, perhaps absurd, technological endeavor, contrasting with the more tangible replica of the Apple Globe and its accompanying calendar.