Mr. Khan works through the equations that he derived in previous videos. In this fourth video of in a series of five, he uses an equation that he created himself.

This lecture continues the calculations involved in deducing the number of possible detectable civilizations. The main subject is a comparison of the traditional Drake equation and the calculations made in the previous videos in this...

The idea of whether or not communication from other planets can be transmitted and received is discussed in this presentation. The various issues, such as relative stages of development, the ability to receive a transmission, and whether...

Sal outlines a framework for detecting possible civilizations in our universe. He considers the number of stars and uses the requirements for civilizations to derive the number of potentially suitable planets. The Drake equation can help...

The Middle East during the Bronze Age was made up of many different civilizations, but based on economic, trade, and familial connections, one could consider the region as its own civilization. Learn more about the Middle East during the...

Can war be an indication of a growing civilization? Crash Course World History explores the ways that wealth and power work together to form and defend empires throughout the history of mankind.

International exploration and trade have largely carved out the world we know now. However, these historical movements often contributed to widespread pandemics of diseases, including the Bubonic Plague and other regional illnesses that...

In 1996, Samuel Huntington predicted that in a post-Cold War world, the primary source of conflict would be due to cultural and religious differences, rather than ideological ones. Introduce The Clash of Civilizations with a short,...

Have you ever looked at the newest smartphone and wondered if we have reached the apex of technological advancement? Journey through an exploratiovn of the Kardashev and Barrow scales to see how Earth's civilization can still advance in...

Ever heard of von Neumann machines? These self-replicating machines could allow for the expansion of human civilization beyond Earth. The video describes how this type of technology could open many doors for exploration and life.

Delve into the world of Malian ruler Mansa Musa, the development and culture of African kingdoms such as the Swahili civilization, the use of oral tradition, and the spread of Islam across trade routes. The narrator does an...

What constitutes a civilization? In a swift, engaging, and humorous fashion, John Green begins this edition of Crash Course History by exploring the symptoms of a civilization, such as surplus production, cities, social stratification,...

The lecturer discusses reasons why we haven't detected any of the possible 12.5 civilizations deduced to be residing in the Milky Way Galaxy based on the Drake equation. The space between possible civilizations is discussed, as is the...

Through a video, this tutorial enables the student to identify the four major Early River Valley civilizations. [10:45]

When humans began farming, new, more complex ways of living were possible. This video looks at the factors that led to the rise in agriculture. [2:37]