ZME Science on MSN
Archaeologists Just Found a Maya Board Game That Survived 15 Centuries Underground
Archaeologists working at Naachtun, a Maya city between Tikal and Calakmul, have uncovered a unique fifth-century patolli ...
Pnamz = defines the local z-axis direction, `pnamo' to `pnamz' Pnamx = defines the local x-axis direction, which is the vector from `pnamo' to `pnamx' projected onto the plane normal to the local ...
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