Brainstuff

When manual transmissions are put in reverse, they produce a loud, whirring noise. What's the culprit? Gears. Marshall Brain explains how helical and spur gears work in manual transmissions in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

The Strategic Petroleum Reserve is the world's largest emergency oil stockpile. But why do we have it? Where do we keep it? Find out why the United States created this reserve and where the oil is stored in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

The Radio Data System, or RDS, allows your radio to display information like song titles and radio station call signs. Find out how the RDS works in this podcast from HowStuffWorks.com. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

There are many different types of residential real estate: traditional houses, condos, mobile homes, etc. But what's the difference between these types? Marshall Brain breaks it down for you in this episode of BrainStuff. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

In the current U.S. debate over health care reform, a government-sponsored public option has been a controversial topic. Tune in to this episode of BrainStuff to hear Marshall Brain explain the nuances and implications of the public option. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

The greens on a golf course are famously smooth and perfect-looking, but how do they get that way? Discover how careful planning, the right ingredients and a whole lot of maintenance yield a flawless green in this episode of BrainStuff. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Table salt contains iodine to help prevent thyroid problems and iodine deficiencies. Find out how table salt keeps your thyroid happy -- and what iodine has to do with a nuclear attack -- in this episode of BrainStuff. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Most people are familiar with the concept of replying to a party invitation via R.S.V.P., but what exactly do those letters represent? Learn more about the origins and practices of etiquette in this episode of BrainStuff. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Gravity affects us every single day, but how does this oh-so-common force of nature work? Tune in to this podcast from HowStuffWorks.com to take a look at the nuts and bolts of gravity. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Many spray can lids have a tiny hole at the top. Check out this HowStuffWorks podcast to learn more about spray cans, shipping and air pressure. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

It's often said that "nature abhors a vacuum." If that's true, then why doesn't the vacuum of space suck away our atmosphere? Tune in as Marshall Brain explains the science behind vacuums in this HowStuffWorks podcast. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

A family of four can consume more than 300 gallons of water per day. Old toilets use 5 gallons per flush, and this water use quickly adds up. Check out this HowStuffWorks podcast and learn why cities across the US are replacing their old commodes. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

A typical recycling symbol on plastic looks like a triangle made of arrows. There are seven different types of plastic indicated by the symbols. Check out this HowStuffWorks podcast to learn the difference between each of these plastic types. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

The thin piece of plastic called a Fresnel lens solves some of the problems inherent in traditional magnifying lenses. Learn more about the benefits and weaknesses of Fresnel lenses in this podcast from HowStuffWorks.com. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

When you put prolonged pressure on your feet, arms or legs, you temporarily cut off or scramble communications between your brain and your body parts. Marshall explains exactly what happens when body parts "fall sleep" in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Nissan recently released the Leaf, a model which may be the first viable electric car to come on the market. How does it work? Why do people have high hopes for it? Tune in to this podcast from HowStuffWorks.com to find out more about the Nissan Leaf. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

The brake warning lights in your car light up as part of a routine test. When they stay on, they indicate that there's something wrong with your brake system. Learn more about brake warning lights in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Your average ream of printer paper is called 20-pound bond paper, but it doesn't actually weigh 20 pounds. Tune in as Marshall explains this strange American paper naming system -- and its metric alternative -- in this podcast from HowStuffWorks.com. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Christmas is the biggest holiday on the American calendar -- but how did it get this way? Travel back in time with Marshall Brain as he explores the evolution of Christmas in this special holiday episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

The West Coast of the United States seems to produce bigger, more impressive waves than the East Coast. But why? In this episode, Marshall explains the various factors that make West Coast waves bigger and better. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.