Learn how to use a Punnett square to solve a Mendelian monohybrid cross with one of the Amoeba Sister's favorite classroom pets: hairless guinea pigs.

This video will show how to set up and solve everyone's favorite 16 square Punnett square.

In 1972, Thomas Sankara was swept into the revolution seeking to wrest control of Madagascar from France’s lingering colonial rule. The protests inspired the West African native to read works by socialist leaders and seek wisdom from...

In the 1600s, an expansive autonomous settlement called Palmares reached its height in Brazil. It was founded and led by people escaping from slavery, also called maroons. It was one of the world's largest maroon communities, its...

From 1975 to 1979, the Communist Party of Kampuchea ruled Cambodia with an iron fist, perpetrating a genocide that killed one fourth of the country's population. Roughly one million people were executed as suspected political enemies or...

Can global capital markets become catalysts for social change? According to investment expert Audrey Choi, individuals own almost half of all global capital, giving them (us!) the power to make a difference by investing in companies that...

For the young and unemployed in the world's big cities, dreams of opportunity and wealth do come true -- but too often because they're heavily recruited by terrorist groups and other violent organizations. Human rights advocate Mohamed...

In which John Green teaches you about the fall of the Roman Empire, which happened considerably later than you may have been told. While the Western Roman Empire fell to barbarians in 476 CE, the Byzantines in Constantinople continued...

Why are some countries rich? Why are some countries poor? In the end it comes down to Productivity. This week on Crash Course Econ, Adriene and Jacob investigate just why some economies are more productive than others, and what happens...

When bankers refused to serve her neighbors in rural India, Chetna Gala Sinha did the next best thing: she opened a bank of her own, the first ever for and by women in the country. In this inspiring talk, she shares stories of the women...

In which John Green teaches you about the Vereenigde Oostindische Compagnie, doing business as the VOC, also known as the Dutch East India Company. In the 16th and 17th centuries, the Dutch managed to dominate world trade, and they did...

Remember that guy from 300? What was his name? ARG!!! It turns out our brains make and recall memories in different ways. In this episode of Crash Course Psychology, Hank talks about the way we do it, what damaging that process...

Along the Nile River, in what is now northern Sudan, lay the ancient civilization of Kush. Though they were once conquered by a powerful neighbor, the kings and queens of Kush would go on to successfully challenge two of the most...

It was the western hemisphere's largest empire ever, with a population of nearly 10 million subjects. Yet within 100 years of its rise in the fifteenth century, the Inca Empire would be no more. What happened? Gordon McEwan details the...

Before the sun never set on the British Empire; before Genghis Khan swept the steppe; before Rome extended its influence to encircle the Mediterranean Sea; there was ancient Assyria. Considered by historians to be the first true empire,...

Most history books will tell you that the Roman Empire fell in the fifth century CE, but this would've come as a surprise to the millions who lived in the Roman Empire through the Middle Ages. This Medieval Roman Empire, today called the...

Dr. Seyi Oyesola takes a searing look at health care in underdeveloped countries. His photo tour of a Nigerian teaching hospital -- all low-tech hacks and donated supplies -- drives home the challenge of doing basic health care there.

Aztec Empire: The SPANISH are coming! #documentary #ancienthistory history

In this video, produced for and with the Museum of Oxford, our presenter, Ben Kehoe, explores the challenges facing Oxford's residents as their city became the Royalist Capital during the English Civil War.

Street children in Delhi & how the charity Butterfly is helping them by setting up a bank that makes them money & gets them off the street.

Turin is the capital of the Piedmont region and an important business and cultural center in northern Italy. Explore the city's origins as a Roman municipality, whose ancient influence can still be seen in the chessboard-grid layout of...

With 2.7 million inhabitants, Rome is Italy's most populated city. It is also the nation's capital, and all international embassies are located here. Rome also contains Vatican City, the headquarters of the Roman Catholic Church. Home to...

Often described as the metropolis with the turbulent past, Berlin is by far the most exciting and cosmopolitan city in Germany. It’s the official capital and attracts a huge amount of investment. In addition, numerous corporate,...

With the signing of its constitution in 1993, South Africa was divided into nine provinces, each with its own capital, legislature, and unique characteristics. The four provinces of the greatest economic importance and with the highest...