The Pyramid That Chirps Like a Sacred Bird

Clap your hands in front of the pyramid at Chichén Itzá and the echo chirps back — sounding almost exactly like the quetzal, a bird the Maya considered sacred. The staircase is built so sound scatters off each step into that descending call, and twice a year the setting sun casts a shadow serpent down the same stairs. Sound and light, both engineered into one structure over a thousand years ago. Deliberate acoustic design, or a happy accident?
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