An analogue clock, a clock with hands, shows the numbers 1 through to 12. It is a 12-hour clock. The first 12 hours of the day, from midnight to midday, are called am. The next 12 hours, from midday ...

The article explores the historical roots and practical applications of the 12-hour and 24-hour time formats. Originating from ancient Egypt and Babylonia respectively, these systems offer distinct ...

Here’s what you’ll learn when you read this story: Our biological clock, or circadian rhythm, is immensely important to our health, and scientists are now unpacking the process’s secrets at the ...