Mexico's vast capital — Ciudad de México, among the largest cities in the Americas — is under threat from a severe water crisis and vulnerable to disasters like earthquakes. Learn how this city developed and the successes and struggles...

With worldwide Internet traffic set to triple between 2017 and 2021, we examine the near-term future of Internet Infrastructure—from 5G to prefabricated data centers to robotically-maintained server farms.

These ten countries have the most people living in modern slavery, or victims of human trafficking.

Dhaka, the capital of Bangladesh, is the fastest-growing city in the world, fueled by flooding, poverty, and people seeking jobs. It faces huge challenges like overcrowding, unsafe water, weak government services, and rising threats from...

From crossing the uncanny valley in human animation, to light-field camera technology that will change the way moving images are captured, this is the future of visual effects in films, TV, and VR.

The top ten countries on the World Giving Index, determined by a worldwide poll of three factors: helping a stranger, donating money, and volunteering. A study by the Charities Aid Foundation.

I traveled to Casper, Wyoming to experience totality—a complete solar eclipse. HD Eclipse video by Erika Valkovicova

Cairo, Egypt, is one of the world’s oldest and largest cities, growing for thousands of years along the Nile River. While it has a rich history and culture, modern Cairo struggles with overcrowding, poor housing, and climate change,...

Tokyo is the most successful metropolis in the history of the world with 39 million residents, 50% more people than any other urban area. It is the safest big city on the planet and has a two trillion dollar GDP--an economy larger than...

Paris, known as the "City of Light," has a long history of innovation in art, science, and city planning. From its roots as a Roman town to its role in the Enlightenment and the French Revolution, Paris has shaped global ideas. Today, it...

São Paulo is Brazil’s largest city and a major economic center, but its fast growth has created serious problems like polluted rivers, overcrowded favelas, traffic jams, and water shortages. Government plans aim to improve housing,...

The 1963 March on Washington was the largest civil rights demonstration in U.S. history, where over 250,000 people gathered to demand jobs, equality, and justice. Led by organizers like Bayard Rustin and featuring powerful...

Warming ocean water is weakening a major current system called the Atlantic Meridional Overturning Circulation (AMOC), which helps regulate global weather. Melting ice in Greenland and freshwater from rivers are making the ocean less...

Philadelphia was America’s first capital and played a key role in the nation’s founding, including where the Declaration of Independence and Constitution were written. The city is known for its many “firsts,” like the first hospital,...

As the planet warms, there's more water vapor in the air, which makes storms stronger and causes heavier rain and snow. This extra heat and humidity can also make it dangerous to live in some places, especially at night when bodies can’t...

In the late 1800s, Chicago grew rapidly into a major industrial city, but its wooden buildings and poor planning led to the Great Fire of 1871, which destroyed much of the city. Amazingly, the city quickly rebuilt, creating the world’s...

Chengdu, a major city in southwest China, has become known as the country's "park city" thanks to its focus on green spaces and modern urban planning. With a rich 3,000-year history and rapid growth in recent decades, it has expanded its...

The Arctic is warming quickly, and this is changing the jet stream—a strong wind high in the sky that affects weather. The jet stream is becoming slower and more wavy, which causes extreme weather to last longer, like very cold winters...

The oceans are very important in climate change because they take in almost 90% of the heat trapped by greenhouse gases and a lot of carbon dioxide. This makes the oceans warmer and more acidic, which has led to record-low sea ice,...

Deborah Riley Draper is a writer, director, filmmaker, producer, and author of Olympic Pride, American Prejudice. Her documentary and book explore the untold story of 18 African-American athletes who competed in the 1936 Berlin Olympics,...

What was the Secret Weapon of the Carthaginian Empire?

How did the Fatimids conquer Egypt? A pivotal moment in Islamic History DOCUMENTARY

Second Battle of Philippi, 42 BC Rise of Caesar Augustus (Part 5) Ancient History DOCUMENTARY

This video explores the pivotal moment in history when Hannibal, after achieving a series of remarkable victories in Italy, decided not to march on Rome despite being just 130 kilometers away. Delving into the strategic and tactical...