In 1967, researchers gathered to answer a long-running scientific question: just how long is a second? It might seem obvious at first. A second is the tick of a clock, the swing of a pendulum, the time it takes to count to one. But how...

The 24-hour day concept comes from the ancient Egyptians. They divided the day into 10 hours with devices like shadow clocks and then added one hour at each end (one for twilight and one at the end of the day). Later, a T-shaped bar was...

Delve into the precise world of atomic clocks with Judah, the man who keeps the U.S. on time, from phones to power grids.

This video delves into the Gregorian and Chinese lunar calendars, explaining their differences and the lunar calendar's influence on Chinese cultural traditions. It explores the Chinese Zodiac's twelve animal signs and their associated...

Our ancestors looked to the heavens to record the passage of time. As civilizations emerged, the need to tell time in a consistent manner became essential. Ancient Egyptians used the shadow clock to separate morning from afternoon and...

Dave Wineland, NIST physicist and 2012 Nobel Laureate in Physics, discusses his landmark work developing laser cooling, a technique that has led to ultraprecise atomic timekeeping and advances in experimental quantum computing.

Our ancestors looked to the heavens to record the passage of time. As civilizations emerged, the need to tell time in a consistent manner became essential. (3500 BCE) Ancient Egyptians used the shadow clock to separate morning from...

You asked for more indigenous technologies, and so today I’m going to tell you about how native american peoples kept track of time.

Learn how calendars help organize our days and prevent confusion when scheduling meetings and activities. We will discusses different types of calendars, such as the Gregorian calendar, religious calendars, national calendars, and fiscal...

The 24-hour day concept comes from the ancient Egyptians. They divided the day into 10 hours with devices like shadow clocks and then added one hour at each end (one for twilight and one at the end of the day). Later, a T-shaped bar was...

Our ancestors looked to the heavens to record the passage of time. As civilizations emerged, the need to tell time in a consistent manner became essential. (3500 BCE) Ancient Egyptians used the shadow clock to separate morning from...

This video provides a brief overview of satellites, their history, and their various purposes. It explains how satellites are used for military missions, astronomical observations, navigation, and communications. By floating in space and...

This video offers a concise explanation of how pendulum clocks work, focusing on the role of the pendulum and its interaction with the gears of the clock. It highlights the energy conversion involved and how the pendulum regulates the...