Ancient Technology: The Timekeeping Stone That Rings at Set Intervals

Was there a timekeeping stone?

The villager decided to bring the rock home as a toy for his child to play with, and after a few days, the family noticed something peculiar about the stone: Every noon and midnight, the stone would emit a 'clanging' sound. Perplexed, the man placed the stone on his family shrine for safekeeping. (Image: Martin Novak via Dreamstime)

The Amazing Egyptian Egg Ovens

Egyptian egg ovens.

Egyptian egg ovens are more than 2,000 years old. (Image: via Wikimedia Commons)