Science: Diggers

The pick-&-shovel corps of Science toils far afield, probing the earth for traces of vanished animals, men and civilizations. Recent doings of diggers:

Guatemala. In the ruins of the Mayan city of Piedras Negras, an expedition headed by Dr. J. Alden Mason of Philadelphia's University Museum found a rectangular limestone carving in high relief which showed plainly that the unknown sculptor had a sense of humor, at least of satiric portraiture. The block, 49 in. long, was called a lintel, although its scanty margins indicated that it was used not over a...

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