Right Now in BrainStuff

BrainStuff: Why do limbs fall asleep?

Pressure on nerves can cause the nerves to stop sending impulses to the brain, causing limbs to fall asleep. Learn more about limbs falling asleep in this episode of BrainStuff.

BrainStuff: Why Does Alka-Seltzer Fizz?

The fizzing you see when you drop an Alka-Seltzer tablet in water is the same sort of fizzing that you see from baking powder. This reaction is caused by an acid reacting with a base. Check out this BrainStuff episode to learn more.

BrainStuff: How Do Polygraph Machines Work?

Also known as 'lie detectors,' polygraphs are used to record an individual's vital signs, such as breathing rate, pulse, and so forth. Check out this episode of BrainStuff to learn more about polygraphs and the art of lie detection.

BrainStuff: Do The Humps On Camels Hold Water?

The camel's hump is a giant deposit of fat that lets the camel survive up to 2 weeks without food. Learn more about camels in this episode of BrainStuff.

BrainStuff: How Do You Create "Fog"?

There are a few methods for creating "fog," including glycerine-based fog juice as well as dry ice. Check out this episode of BrainStuff to learn how to "fog" up your Halloween party.

BrainStuff: How Does The Nobel Prize Work?

Nobel Prizes are highly prestigious, valuable awards that have been given out to visionaries and pioneers in select fields since 1901. Tune in to find out more about the Nobel Prize in this episode of BrainStuff.

BrainStuff: Where Do Bullets Go When Fired Into The Air?

When people fire guns into the air in a celebratory manner, those bullets have to go somewhere. Find out how high fired bullets can go -- and why they can be dangerous -- in this episode of BrainStuff.

BrainStuff: How Does The Affordable Care Act Work?

Want to learn how the Affordable Care Act works? Tune in to this episode of BrainStuff to learn all about the ACA.

BrainStuff: How Can There Be Seedless Grapes?

Seedless grapes are the most common kind on the market, but have you ever wondered how a grape can be seedless? How does it grow? Discover how seedless grapes accidentally came about -- and how they grow -- in this episode of BrainStuff.

BrainStuff: What Is Chewing Gum Made Of?

Up until World War II, chewing gum was made of a substance called chicle. Check out this BrainsStuff episode to learn more about the ingredients of modern chewing gum.

BrainStuff: What Are Hot Dogs Made From?

Hot dogs were first created in Frankfurt, Germany. But what exactly are they made from? Check out this episode to learn more about the mysterious ingredients of hot dogs.

BrainStuff: How Does Dynamite Work?

Dynamite is a type of chemical explosive. Discover how explosives from gasoline to dynamite work in this episode of BrainStuff.

BrainStuff: Why Do Human Beings Have Eyebrows?

Eyebrows are prominent human features, but what purpose do they serve? Scientists think they help keep stuff out of our eyes and aid in nonverbal communication, among other things. Learn more about eyebrows in this episode.

BrainStuff: How Much Oxygen Does a Person Consume in a Day?

Ever wonder how much oxygen you breathe in a day? Watch this episode of BrainStuff and find out!

BrainStuff: How many balloons would it take to lift you off the ground?

Balloons are often filled with helium, which has a lifting force of one gram per meter. It's possible to assemble enough balloons to lift yourself from the ground -- but how many balloons does it take? Tune into this episode to learn more.

BrainStuff: How Quickly Does Hair Grow?

On average, human hair grows a small amount each day. Watch as Jonathan and Lauren explain hair growth in this episode of BrainStuff.

BrainStuff: Why Do Feet Stink?

What causes stinky, smelly feet? Sweat and bacteria. Find out exactly how bacteria turn sweat into malodorous feet in this episode.

BrainStuff: How Do You Decaffeinate Coffee and Tea?

There are multiple methods of removing caffeine from naturally caffeinated plant products. Learn more about these processes -- and how much caffeine they really remove -- in this episode.

BrainStuff: Is Chocolate Poisonous to Dogs?

Under the right conditions, chocolate can indeed be deadly for dogs. Tune in to learn more about the compound in chocolate that makes it dangerous for dogs (and how much is too much) in this episode of BrainStuff.

What makes some ice cloudy and some perfectly clear? Discover the answer and learn how to make your own batch of clear cubes in this HowStuffWorks podcast.