What is AI, really? Jeff Dean, the head of Google's AI efforts, explains the underlying technology that enables artificial intelligence to do all sorts of things, from understanding language to diagnosing disease -- and presents a...

With the amount of fake and doctored photos and videos out there, how can we know what to trust? Most of us are used to thinking that "seeing is believing" but as technology makes it easier and easier to spread unreliable content online...

Night blindness is real, and it can be caused by any number of things that affect the complicated mechanics of your vision.

Whatever happened to chemistry sets? They turned entire generations of children on to chemistry, and they also have their own illustrious history. Hank takes you through a tour of the chemistry set over time, and tells you how you can be...

Sphincters -- they're not just for butts! Hank explains the fascinating truth about these magic rings of muscle, where they appear in the human body and the pretty fantastic functions they perform in the animal kingdom.

It's not the passage of time that makes it so hard to get older. It's ageism, a prejudice that pits us against our future selves -- and each other. Ashton Applewhite urges us to dismantle the dread and mobilize against the last socially...

Relativity Isn't Relative

Hypnosis: that's just a fun gimmick for stage shows and plot twists, right? Well, turns out there might be more to it.

In 1884, the British steamer “Rumney” crashed into the French ship “Frigorifique.” Seeing their ship filling with water, the French crew climbed aboard the “Rumney.” But as they sailed towards port, a silent form emerged from the fog –...

From the "I have a dream" speech to Steve Jobs' iPhone launch, many great talks have a common structure that helps their message resonate with listeners. In this talk, presentation expert Nancy Duarte shares practical lessons on how to...

Hank gives you five MORE reasons why you should probably avoid smoking, or quit if you already smoke - in addition to those big ones you already know about. These are the weird reasons.

Bartenders need to know your age, retailers need your PIN, but almost no one actually needs your name -- except for identity thieves. ID expert David Birch proposes a safer approach to personal identification -- a "fractured" approach --...

Hank gets to the bottom of two studies reporting high sea ice coverage and snowmass in Antarctica in the same year that the Arctic has reported a record low of sea ice. What is going on here?

Your love for Rihanna or Tom Hardy may be unrequited, but that doesn't necessarily make it unhealthy.

What's the harm in buying a knock-off purse or a fake designer watch? According to counterfeit investigator Alastair Gray, fakes like these fund terrorism and organized crime. Learn more about the trillion-dollar underground economy of...

Author AJ Jacobs embarked on a quest with a deceptively simple idea at its heart: to personally thank every person who helped make his morning cup of coffee. More than one thousand "thank yous" later, Jacobs reflects on the...

Laughing is a universal human behavior, one that transcends borders of language and culture. But it's also REALLY WEIRD. Why do we do it? The answer has less to do with humor than you might think

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...

Daniel Lismore's closet is probably a bit different than yours -- his clothes are constructed out of materials ranging from beer cans and plastic crystals to diamonds, royal silks and 2,000-year-old Roman rings. In this striking talk,...

Whether it's dandelions blooming in your backyard or purslane sprouting from the sidewalk, vegan forager Alexis Nikole Nelson is on a mission to show how freely growing flora could make its way to your plate. With contagious enthusiasm...

Cave explorer and geologist Francesco Sauro travels to the hidden continent under our feet, surveying deep, dark places inside the earth that humans have never been able to reach before. In the spectacular tepuis of South America, he...

The idea that our reality is a simulation is not as far-fetched as you may think. Many philosophers, scientists and tech-billionaires are seriously considering not just the possibility but the high probability that our civilization may...

Why is it so hard to speak up and productively disagree at work? Leadership and organization coach Betsy Kauffman shows how to bring the candid conversations that usually happen at the watercooler out into the open with four practical...

It’s become a common belief worldwide that gulping down a glass of milk will make you phlegmy. But... there seems to be no real scientific evidence to back up that claim.