A 2,000-Year History of Alarm Clocks - Atlas Obscura

Yi Xing was a bit of an overachiever. A mathematician, engineer, Buddhist monk and astronomer, Xing was asked to improve calendars in China. He took it one

Places - Atlas Obscura

Features - Atlas Obscura

Features - Atlas Obscura

Alarm clock - Wikipedia

Peek Inside a Private Clock Museum in Austria - Atlas Obscura

Peek Inside a Private Clock Museum in Austria - Atlas Obscura

Ancient Greek 'alarm clock' stuns researchers with 2,000-year-old technology - Greek City Times

130 Weird but True Fun Facts To Amaze and Surprise Everyone

Medieval Clock – Salisbury, England - Atlas Obscura