In this funny, casual talk from TEDx, writer Jenna McCarthy shares surprising research on how marriages (especially happy marriages) really work. One tip: Do not try to win an Oscar for best actress.

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...

In much of the world, gender is viewed as binary: man or woman, each assigned characteristics and traits designated by biological sex. But that's not the case everywhere, says France Villarta. In a talk that's part cultural love letter,...

They say mom's never far away, but I don't think this is what they had in mind. In this episode, learn about the mind-blowing connection you share with your mom. A little bit of you never leaves the other!

The word "normal" is often used as a synonym for "typical," "expected," or even "correct." By that logic, most people should fit the description of normal. But time and time again, so-called normal descriptions of our bodies, minds, and...

Two tiny handprints stamped into a cake. A mirror that shatters without warning. A trail of cracker crumbs strewn along the floor. Everyone at 124 Bluestone Road knows their home is haunted— but there's no mystery about the spirit...

This week, John is talking about Toni Morrison's novel of friendship, betrayal, and loss, Sula. Sula tells the story of two African American girls, the town where they grew up, the tragic even that was central to their youth, and the...

"It shouldn't be an act of feminism to know how your body works," says gynecologist and author Jen Gunter. In this revelatory talk, she explains how menstrual shame silences and represses -- and leads to the spread of harmful...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. In 1996, Thordis Elva shared a teenage romance with Tom Stranger, an exchange student from Australia. After a...

Romantic chemistry is all about warm, gooey feelings that gush from the deepest depths of the heart-right? Not quite. Actually, the real boss behind attraction is your brain, which runs through a very quick, very complex series of...

Working in Vienna at the turn of the 20th century, he began his career as a neurologist before pioneering the discipline of psychoanalysis, and his influence towers above that of all other psychologists in the public eye. But was Sigmund...

Now more than ever, it's important to look boldly at the reality of race and gender bias -- and understand how the two can combine to create even more harm. Kimberle Crenshaw uses the term "intersectionality" to describe this phenomenon;...

Halima Aden made history when she became the first hijab-wearing model on the cover of Vogue magazine. Now she returns to Kenya's Kakuma Refugee Camp -- where she was born and lived until the age of seven -- to share an inspiring message...

We're still leading up to World War II, but first we gotta talk about the rise of the dictators. Today we talk about the rise of militaristic dictatorships in Germany, the Soviet Union, Japan, and Spain, and the economic depression that...

Have you had your period at the same time as your friends or family members? Is this a physiological effect or coincidence? Join Hank Green as he provides some insight on this phenomenon!

It's 1843, and a debate is raging about one of the most common killers of women: childbed fever— no one knows what causes it. One physician has observed patients with inflammation go on to develop childbed fever, and therefore believes...

Many people across the world don't have access to healthy food -- while in other places tons of food go to waste. Social entrepreneur Ndidi Okonkwo Nwuneli thinks we can take bold steps to fix this problem. She lays out what it would...

What can you do to build a better world? Sharing stories from her pioneering career dedicated to tackling poverty, Jacqueline Novogratz offers three principles to spark and sustain a moral revolution. Learn how you can commit (or...

Justin Baldoni wants to start a dialogue with men about redefining masculinity -- to figure out ways to be not just good men but good humans. In a warm, personal talk, he shares his effort to reconcile who he is with who the world tells...

It is time for a gender reckoning, beginning with men authentically confronting our internal selves and each other, says essayist and intersectional justice advocate Jimmie Briggs. In this call to action for gender equity, he unpacks how...

Today we’re exploring another branch of conflict theory: gender conflict theory, with a look at sociology’s forgotten founder, Harriet Martineau. We’ll also discuss the three waves of feminism, as well as intersectionality.

If you've ever been pregnant, or been around a pregnant lady, you know that the agony that is morning sickness -- and it's not just something that happens in the morning! SciShow explains the many theories about what causes it.

In the 20th century we added an unprecedented number of years to our lifespans, but is the quality of life as good? Surprisingly, yes! Psychologist Laura Carstensen shows research that demonstrates that as people get older they become...

In 1991, Shaka Senghor shot and killed a man. He was, he says, "a drug dealer with a quick temper and a semi-automatic pistol." Jailed for second degree murder, that could very well have been the end of the story. But it wasn't. Instead,...