Moving the Obelisks:

Dating from the beginning of historical memory, the obelisks of ancient Egypt—those tall, tapering shafts typically weighing from 200 to 500 tons—were carved from a single block of solid stone to commemorate the ruler of the moment.

Many of these ancient monoliths, taken from Egypt as trophies of conquest and symbols of power through the efforts of extraordinary human labor and engineering ingenuit...