In which John Green teaches you about World War II, and some of the causes behind the war. In a lot of ways, WWII was about resources, and especially about food. The expansionist aggression of both Germany and Japan were in a lot of ways...

How do you know if that shocking photo in your feed is real, or just another AI fake? Digital forensics expert Hany Farid explains how he helps journalists, courts and governments find structural errors in AI-generated images, offering...

Long ago, an emperor decided to build a great wall to protect his new empire and ensure his power. He ordered men across China to leave their homes and submit to the grueling labor required for its construction. As years passed and the...

During the 14th and 15th centuries, mercenaries known as condottieri dominated Italian warfare, profiting from— and encouraging— the region's intense political rivalries. As rulers competed for power and prestige, their disputes often...

From medieval knights to face shields, humans are pretty big fans of armor. But it turns out that other organisms use armor, too! Except sometimes, their armor doesn’t look like anything we’d expect. Hosted by: Rose Bear Don't Walk

Who runs the world? Political scientist Ian Bremmer argues it's not as simple as it used to be. With some eye-opening questions about the nature of leadership, he asks us to consider the impact of the evolving global order and our...

It's 791 CE. As the morning sun shines on the Golden Gate Palace, brother and sister Hisham and Asma prepare for the journey of a lifetime: the hajj, a holy pilgrimage to Mecca. They intend to travel with the big hajj caravan— but a...

A cockroach and jewel wasp are locked in battle. The wasp latches onto the cockroach and inserts her stinger into the cockroach's brain, where her venom blocks its fight-or-flight response. Now, the cockroach is essentially a zombie, and...

The U.S. has been fighting in Afghanistan since shortly after 9/11, ousting the Taliban and their harsh interpretation of Islam from power that fall. But the insurgent group as which it reformed has plagued Afghanistan with violence ever...

Suicides by active duty U.S. troops last year exceeded the number of servicemen and women killed in combat in Afghanistan. Ray Suarez talks to psychiatrist and retired U.S. Army Brig. Gen. Stephen Xenakis, who says more than half of the...

Ethnic-Armenian forces last week handed over two regions to Azerbaijani

control as part of Russia-brokered armistice that ended the six-week
war
over the Nagorno-Karabakh region. Moscow has sent peacekeepe
rs to the...

Three months ago, President Biden ended American military involvement in

the war in Yemen and reversed President Trump's decision to designat
e the
Houthis a terrorist organization. But soon after, as special...

Current treatments for depression and PTSD only suppress symptoms, if they work at all. What if we could prevent these diseases from developing altogether? Neuroscientist and TED Fellow Rebecca Brachman shares the story of her team's...

In which John Green teaches you about the war that was supposed to end all wars. Instead, it solved nothing and set the stage for the world to be back at war just a couple of decades later. As an added bonus, World War I changed the way...

Early telegraph operators and WWI spies picked up some weird noises on radio waves. As it turned out, they were actually listening to plasma waves in Earth’s magnetic field lines!

World War I was very hard on the Russian Empire. So hard, in fact, that it led to the end of the Russian Empire. As the global conflict ground on, Tsar Nicholas II faced increasing unrest at home. Today we'll learn about the Revolutions...

Back in 1862, soldiers fighting in the American Civil War noticed a strange blue glow on their wounds. It took a couple of High School students to figure out what it was.

Botanist Corneille Ewango talks about his work at the Okapi Faunal Reserve in the Congo Basin -- and his heroic work protecting it from poachers, miners and raging civil wars.

In this powerful talk, P.W. Singer shows how the widespread use of robots in war is changing the realities of combat. He shows us scenarios straight out of science fiction -- that now may not be so fictitious.

Nostalgia was once considered an illness confined to specific groups of people. Today, people all over the world report experiencing and enjoying nostalgia. But how does nostalgia work? And is it healthy? Clay Routledge details the way...

Clint Smith teaches you about one of the most famous writers, orators, and advocates of the 19th century, Frederick Douglass. Douglass was born in slavery, escaped to the North, and became one of the most influential people of his time....

A single determined termite braves countless threats to participate in the only flight of her lifetime. She evades the onslaught of predators as she lands, flips off her wings, secretes pheromones, and attracts a mate. But she's not...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences.



"Freakonomics" author Steven Levitt presents new data on the finances of drug dealing. Contrary to...

In which John Green teaches you about war! Specifically, John talks about whether humanity is naturally warlike, hard-wired to kill, or if perhaps war is a cultural construct. John will talk about the Hobbes versus Rousseau debate, the...