* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Armed with bracing logic, wit and her "public-health nerd" glasses, Elizabeth Pisani reveals the myriad of...

So, what exactly is a scientific revolution? And are they more than just moments in time Historians use to mark the beginning and ending of things through time? In this episode we'll look into some ideas and people named Nick and how...

Tissue engineer and TED Fellow Nina Tandon is growing artificial hearts and bones. To do that, she needs new ways of caring for artificially grown cells -- techniques she's developed by the simple but powerful method of copying their...

Gravity may be doing a lot more than just keeping us planted on the Earth. Scientists are learning that it’s also a key player in how we perceive things.

In a disturbing — but fascinating — walk through history, Frances Larson examines humanity's strange relationship with public executions … and specifically beheadings. As she shows us, they have always drawn a crowd, first in the public...

Summer, 2016: amid populist revolts, clashing resentments and fear, writer Anand Giridharadas doesn't give a talk but reads a letter. It's from those who have won in this era of change, to those who have, or feel, lost. It confesses to...

Featuring Peter Winkler, our SciShow graphics guru, and Professor Claw, the emperor scorpion.

We decided it would be cool to have guests come into the studio and talk about science with H
ank.
in this episode, Peter and Hank...

After witnessing the _violent rage" shown by babies whenever deprived of an item they considered their own, Jean Piaget _ a founding father of child psychology _ observed something profound about human nature: Our sense of ownership...

Today we transition between units on language and aesthetics with a discussion of nonexistent and imaginary objects. Is it possible to make true assertions about things that aren’t real? We’ll explore Meinong’s Jungle and the concept of...

TEDmakes a documentary films that explore trauma

What do kangaroos, koalas, and opossums all have in common? Find out when you learn all about marsupials!

In 2011, eye surgeon and TED Fellow Andrew Bastawrous developed a smartphone app that brings quality eye care to remote communities, helping people avoid losing their sight to curable or preventable conditions. Along the way, he noticed...

Morning glories unfurl their petals like clockwork in the early morning. A closing white waterlily signals that it's late afternoon. And moon flowers, as their name suggests, only bloom under the night sky. What gives plants this innate...

You might know that spicy food can make your mouth feel like it's on fire, but how does it do that?

The internet is full of all sorts of wild claims about shadow governments, lizard people, and the shape of the earth. How can these stories inspire tin foil hats despite hard evidence against them?

Some of us can’t navigate anywhere without a GPS - but are we doomed to a life of directional bewilderment? Or is there hope for us yet?

People don't just cook anymore -- they're cooking, texting, talking on the phone, watching YouTube and uploading photos of the awesome meal they just made. Designer Paolo Cardini questions the efficiency of our multitasking world and...

One day a pair of brothers working together as shoemakers had an explosive fight that split the family business in two. Over the coming years, this disagreement divided their town— residents and businesses chose sides. Could such a...

Let’s face it: humans stink! But that’s not always a bad thing - we use smells to interact with each other and navigate our lives.

How do foxes know where to pounce when they can't see their prey? There's evidence they're using the Earth's magnetic field to help.

Seven years ago, Internet activist Aaron Swartz convinced Lawrence Lessig to take up the fight for political reform. A year after Swartz's tragic death, Lessig continues his campaign to free US politics from the stranglehold of...

Today Hank wraps up this look at your integumentary system and all the hard work it does protecting you from and helping you interact with the world around you.
<
br

/>
--

/>Table of Contents:/>
Protects...

As denizens of the internet, most of us are familiar with the trolls. In this episode of SciShow, learn a little about how social scientists think trolls came to be, and how online communities are figuring it all out.

Hank describes to us some news stories that illustrate how science is continually changing the things we think we "know" - from the status of various animals species, to the way our senses work and even where the Moon came from -...