In which John Green teaches you about the Holy Roman Empire by teaching you about Charles V. Charles Hapsburg was the holy Roman Emperor, but he was also the King of Spain. And the King of Germany. And the King of Italy and the Lord of...

In which John Green teaches you about Imperialism, but not from the perspective of the colonizers. This week John looks at some Asian perspectives on Imperialism, specifically writers from countries that were colonized by European...

In which John Green teaches you about water! So, we talk about resources a lot on Crash Course, and today is no exception. It turns out people can't live without water, which means it's absolutely necessary for civilization. Today John...

In which John Green talks about the methods of writing history by looking at some of the ways that history has been written about the rise of the West. But first he has to tell you what the West is. And then he has to explain the Rise of...

In which John Green teaches you about how Islam has interacted with politics during it's history, and how it continues to do so today. Islamist movements are in the news a lot lately, but how did that happen. John will point out that...

We've been talking about the unavoidables recently. Last time, we covered Death. This time, it's taxes. So, what are taxes? Why do we pay taxes? What is all that tax money used for? This week, Adriene is going to cover all that and more....

Why do exams always tell you to use a number 2 pencil? What happens if you don’t? Quick Questions explains!

You may have had an ultrasound before, and wondered what that gel does. Well, that weird alien goop has a purpose, and it has to do with being like our weird human skin.

This week, Mike is teaching you about the most mythic of mythological creatures: Dragons. Cultures across the world (and across Westeros) tell stories of dragons, and their power to destroy, their power to prop up kings, and their power...

After a week of studying, you feel confident that you'll ace your exam. But when you get your grade back, it's much lower than you expected. You're devastated, and the disappointment is hard to shake. Should you be trying to look on the...

In this video Paul Andersen describes the new AP Biology Exam. This exam will be given for the first time in May of 2013 and will be different from all previous exams. In this video Paul Andersen describes the scoring and the two parts...

Between 1840 and 1914, an estimated 40 million people left Europe. This is one of the most significant migrations in human history. So, who was leaving Europe? And why? Crash Course is on Patreon! You can support us directly by signing...

Paul Andersen reflects on the 2013 AP Biology Exam.

Modern medicine is in danger of losing a powerful, old-fashioned tool: human touch. Physician and writer Abraham Verghese describes our strange new world where patients are merely data points, and calls for a return to the traditional...

Sometimes, friendship isn't forever. At the conclusion of World War II, the old structures of power were a shambles. The traditional European powers were greatly weakened by years of total war and widespread destruction. The USSR was...

The end of the Napoleonic Wars left the great powers of Europe shaken. Judging from the destruction that had been wrought across the continent, it seemed to the powers that be that the Enlightenment had liberated the people, and led to...

Why do exams always tell you to use a number 2 pencil? What happens if you don't? Quick Questions explains!

You may have had an ultrasound before, and wondered what that gel does. Well, that weird alien goop has a purpose, and it has to do with being like our weird human skin.

Much has been written about what exactly caused World War I. As befits a true global war, the reality is that there isn't a single cause. There aren't even three causes. There are a vast array of causes. Today we'll get into just a few...

If you don't have vision problems, getting an eye exam probably hasn't been your top priority, however visiting an ophthalmologist won't just tell you about your eyes, it can reveal a lot about your health.

In 1848, Europe experienced a wave of revolutions. Last week we covered some of the reform movements that presaged these uprisings. This week, we're learning about what the people wanted from the revolutions, who was involved, and how...

It turns out that saving all of your studying until after midnight on the night before your big exam is not actually a great way to prepare. Today, Thomas explains some test prep strategies that actually work.

Exams can be terrifying. It's easy to feel like the weight of the world rests in these moments - like this one test determines your grades and, in turn, your whole future - even if you know, rationally, that this isn't really the case....

New ReviewPMI Agile Certified Practitioner (PMI-ACP) is PMI’s certification for Agile Practitioners. They designed it to demonstrate deep knowledge of Agile principles and methods. In autumn 2024, PMI updated the syllabus massively. Let’s look at...