Right Now in BrainStuff

In case you ever get stranded in the wild without an obvious source of fresh water, here are a few things you can do to collect some. See more »

What Are Eye Boogers?

The gunk builds up at the inner corners of our eyes is residue of the stuff the coats and protects our eyeballs all the time. Learn what it’s made of and why it turns to sand overnight. See more »

Why Do We Get Morning Breath?

Every morning we wake up with bad breath. What does bacteria and a lack of saliva have to do with it? See more »

Do Animals Laugh?

It’s no secret that some animal species are highly intelligent – but do they also “get” jokes? Can they laugh? Are laughter and intelligence even related? See more »

How Much Does It Cost To Run For President?

There’s a big difference between running for President and actually winning the election. So how much money will you need to have a decent shot at being Commander-in-Chief? See more »

Can I See the Stuff Astronauts Left On the Moon?

Astronauts left over a hundred items on the moon's surface. But are today's telescopes powerful enough to see what's there? See more »

What Would Space Do To The Human Body?

Space without a suit? You’ll probably die from the lack of pressure in a vacuum. But other extreme hazards won’t help either. See more »

Does "Power Dressing" Actually Work?

Dressing up to feel powerful may have been a fashion fad of the 1980s, but do we still think differently if we wear formal clothes? See more »

How Dirty Is Soap?

It’s good hygiene to wash your hands after touching shared bathroom surfaces. But bars of soap are a shared surface. Does soap really help get you clean? See more »

How Does Hair Dye Work?

Some hair dyes are basically fine-grained paint. But dyes that stick with you for more than a couple weeks physically and chemically change each hair. Learn how with Christian Sager. See more »

How Do Tattoo Machines Work?

Tattoo machines (sometimes called guns) haven’t changed much since the 1890s because they’re such elegant devices. Tune in to learn how the most common types work. See more »

Could Alien Life Exist?

What makes a planet ideal for sustaining life? See more »

BrainStuff: How Do GPS Coordinates Work?

So you’ve seen those location-tagging numbers on maps and GPS devices before, but do you actually know what they mean? Brainstuff is here to fill you in. See more »

Does the Human Body Really Replace Itself Every 7 Years?

The short answer is “no.” Tune in to learn how long it really takes, plus how nuclear weapons led scientists to the solution. See more »

Are Plants Conscious?

Scientists have found evidence that plants have senses, memories, and can even communicate with each other. But does this mean they're conscious? See more »

Why Are There So Many Different Kinds of Milk?

Christian explains the difference between common types of milk, looking at calories, fat and the rest of their composition. See more »

What Happens When You Get Ringing In Your Ears?

Tinnitus is what makes your ears ring after a loud noise. And it's really annoying. See more »

Why Do We Get Brain Freeze?

We all know what an ice cream headache feels like. Christian's here to explain why they happen. It involves temperature (duh), nerves and lots of blood. See more »

What is Synesthesia?

It’s true – some people hear colors, or taste words. But what produces synesthesia? See more »

Why Is It So Difficult To Chug A Gallon of Milk?

It's one of the strangest - and potentially grossest - challenges out there. But what happens when you drink milk? Why does it make you throw up? See more »