What if one of our oldest ideas about ancestry is simply wrong? Harvard geneticist David Reich argues that ancient DNA has exposed the myth of purity and uncovered a far messier history of who we are and where we came from.

Have you ever woken up after a dream and thought to yourself, “That made absolutely no sense”? According to modern neuroscience, there’s a reason why dreams feel so abstract and bizarre. Two sleep experts discuss.

Historian Eric Cline argues the Bronze Age collapse wasn't the work of one invading force or one bad harvest, but something far harder to stop: An overly interdependent system that had no way to absorb multiple shocks at once.

"It's this modern idea of doing voluntary discretionary, physical activity for the sake of health and fitness."

Language is a huge part of human development, even the language we keep to ourselves. Three experts explain how words and beliefs can change our brains and our lives:

Sleeping better helps you think better, which helps you live better. Three experts explain why quality sleep is imperative to brain function, problem solving, communication, and more.

How can the brain — a piece of matter — love? Physics and chemistry explain the material world, but they can’t explain why it feels like something to be alive. This is the mystery of consciousness, according to these experts.

“A lot of the trends in the economy, in family life have just been much harder for working class men.”

The ocean is evolving, and it’s not based on the ‘survival of the fittest.’ Astrobiologist Betül Kaçar explains how it’s not competition that has kept the ocean alive, but collaboration.

"I think we need a truly open-ended conversation with 8 billion strangers, and what makes that hard to do increasingly is a level of political fragmentation and extremism and partisanship born of our engagement with these new technologies."

Expanding your worldview starts with understanding your brain. Stanford neuroscientist David Eagleman explains.

Who decides what’s “normal” and why? As social norms increasingly dissolve, here’s how to find true guidance.

Biological evolution in humans has slowed. Can AI, culture wars, and modern tech explain why?

The mind-blowing theory that everything is evolving—from minerals to music—explained in 3 minutes by a Carnegie scientist.

“Forget about essences.” Philosopher Daniel Dennett on how modern-day philosophers should be more collaborative with scientists if they want to make revolutionary developments in their fields.

What do aliens, apes, and orchestras all have in common? Professor Michael Spitzer explains how they each help us understand the origins of music.

Ancient societies revered dreams. Modern science tells us why.

What beavers and earthworms can teach us about working with, not against, Mother Nature.

Find food, have sex, not die. That’s pretty much all we need to do — but why do we make it so complicated?

Expert Michael Spitzer explains how culture can “tune” your musical taste.

DAOs don’t have a C-suite. How are they led?

The history of music from bone flutes to Beyoncé.

Rituals come as much from religion as they do from the way Earth spins around the Sun.

According to author and entrepreneur Steven Kotler, at some point this century, we will confront the prospect of immortality.

From trust and conformity to aspiration, this new series, hosted by Todd Rose, explores and decodes the world's greatest Collective Illusions.