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Why now? Some recent coverage
Discovery Telemetry
13/ 100
Discovery Momentum
Derived from recent research, news, creator and media activity.
0/ 100
Source Diversity
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Evidence Status
UnknownBased on the current state of research and debate.
The Core Mystery Brief
A major Maya city dominated by the step pyramid of Kukulcan, engineered to produce a serpent of light at the equinoxes.
What We Know
El Castillo's 91 steps on each of four faces total 365 — one per day of the solar year. The temple produces an acoustic effect mimicking the quetzal bird.
What Is Debated
The degree of Toltec influence versus pure Maya construction is debated.
The Mystery
What astronomical and calendrical knowledge is encoded in El Castillo's design?
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