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Dogs and Humans: A 30,000-Year Friendship

AdultsHistoryHumanPets...
Of all the species that humans have domesticated, dogs are our oldest animal friends. But how did a group of wolves become the furry pup at the end of the bed? New research is finally unlocking the paw-in-hand evolution of dogs and humans. In this episode we're answering one big question: Did we domesticate dogs, or did dogs domesticate us?

Illuminating the Universe: The History of Light

AdultsHistoryTechnologyScience...
Beyond what we can touch, taste, smell, and hear, we experience the universe through light. But how did we come to discover light, and how did we learn light's true nature, as the fastest thing in the universe, an electromagnetic spectrum, a wave and particle capable of the most amazing things? Here is the history of light, according to physics.

The Beginning of Everything -- The Big Bang

AdultsHistoryPhysicsSpace...
How did everything get started? Has the universe a beginning or was it here since forever? Well, evidence suggests that there was indeed a starting point to this universe we are part of right now. But how can this be? How can something come from nothing? And what about time? We don't have all the answers yet so let's talk about what we know.

Everything Scientists Could Learn By Looking At Your Skull

AdultsBiologyHistoryHuman...
Our skulls are all unique, but they also share characteristics across groups of people. Scientists can use this information to learn a lot about the previous "owner" of the skull.

Earth's Magnetic Field Is Going To Flip, Here's How We Know

AdultsFuturePhysicsWorld...
Scientists are using clues from ancient artifacts to help them predict the future of the magnetic field.

Appraisal: 1960 GMT Master Model Rolex with Box & Papers

AdultsGadgetsHistoryTechnology
In Tucson, we learned it's important to keep the box...and your receipt! Peter Planes appraises a rare GMT Master Model Rolex from 1960, one of the highlights from Tucson Hr 2.

How the Meter Became the Meter

AdultsHistoryMathScience
The meter is the world's ultimate measure, but how did it become "the" meter? What is this measurement based on? The story of this revolution in measurement traces its roots to the French Revolution. Scientists decided that an equal and united people should have equal and united measures. So they sent a pair of young astronomers out to measure the world, and invent the meter. Little did they know they'd find nothing but war, deception, and strife along the way. As a result of this ill-fated mission, the meter carries an error that still persists today. Still think the metric system is so perfect?

A brief history of numerical systems

AdultsHistoryMath
1, 2, 3, 4, 5, 6, 7, 8, 9... and 0. With just these ten symbols, we can write any rational number imaginable. But why these particular symbols? Why ten of them?

Google Timelapse Walks You Through Decades of Change in Seconds

AdultsHistoryTechnologyWorld...
Three decades of change in five seconds.

Why doesn't anything stick to Teflon?

AdultsScienceTechnologyHistory
Teflon was in the spacesuits the Apollo crew wore for the moon landing, in pipes and valves used in the Manhattan project, and it may be in your kitchen, as the nonstick coating on frying pans and cookie sheets.

Pigeon Story: How the Rock Dove Became the Sky Rat

AdultsAnimalsHistoryCulture
How the pigeon became known as the sky rat.

What the Fahrenheit?!

AdultsHistoryScience
The crazy story of the arbitrary temperature scale used in a tiny minority of countries.

Why do we feel nostalgia?

AdultsHealthHistoryPsychology
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 our understanding of nostalgia has changed since the term was first coined in the late 17th century.

The Surprising Origin of Thanksgiving Foods

AdultsFoodHistoryReligion...
I'm thankful for science. And also pie.

How the sandwich was invented

AdultsFoodHistory
Today, it is estimated that 50% of Americans eat at least one sandwich every day. And while it's all but impossible to imagine a world without them, sandwiches have only been around since 1762.

Plato's best (and worst) ideas

AdultsHistoryPhilosophy
Few individuals have influenced the world and many of today's thinkers like Plato. He created the first Western university and was teacher to Ancient Greece's greatest minds, including Aristotle.

How much of human history is on the bottom of the ocean?

AdultsEcologyHistoryNature...
Sunken relics, ghostly shipwrecks, and lost cities aren't just wonders found in fictional adventures. Beneath the ocean's surface, there are ruins where people once roamed and shipwrecks loaded with artifacts from another time.