The most unusual manual counting device may well be the quipus used by various Andean communities in South America prior to the arrival of the Spanish and Portuguese conquistadors during the Age ...

Ancient Device, Modern Tragedy School's Sundial To Mark Sept. 11 August 11, 2004 By Christina A. Samuels ...

Cops, teachers, even the public is using this ancient device to save lives Published: Mar. 24, 2018, 12:10 p.m.

On Sept. 11, a sundial outside new Freedom High School in Woodbridge will cast a long, thin shadow on a plaque in the ground. The time the shadow falls on the plaque will correspond to the time ...