Blogs

You Asked:Why can't they solve the mystery of Oak Island off the coast of Nova Scotia? --- Chad, DesMoines, IowaMarshall Brain Answers:Let's start by reviewing the mystery of Oak Island, also known as the Money Pit - a mystery that people have been t ...

You Asked:What happens to water if it's not allowed to expand when frozen? --- Tony, Cut Off, La.Marshall Brain Answers:In nature, or in your kitchen freezer, water expands when it freezes. It gets about 9% bigger. This video gives you a dramatic dem ...

You asked:How is gunpowder made? --- Nick, Swansboro, N.C.Marshall Brain Answers:People have been making gunpowder for many centuries. The basic recipe is therefore well-known and looks like this: 75% Potassium nitrate, 15% Charcoal, 10% SulfurWhat y ...

We run into all these different kinds of alcohol. Let's look at the differences.First there's the alcohol you drink, like Ethanol that you purchase as a car fuel is the same kind of alcohol found in whiskey, but it has been distilled to the point whe ...

You Asked:How do steam boilers work? --- Dominic, Sacramento, Calif.Marshall Brain Answers:You find steam boilers in power plants, factories, steam locomotives, etc. The basic idea is simple - water is turned to steam with a source of heat.Fire tube ...

Chances are that you are sitting in a chair right now, so it seems like you are stationary. But in fact you are moving through the universe at a tremendous speed at this very moment. Let's take a look at where all that motion is coming from.The first ...

You Asked:What happens to your Social Security Number after you die? --- Billy, Kissimmee, Fla.Marshall Brain Answers:Social security numbers of dead people get loaded into a database called the Social Security Death Index. This turns out to be a pub ...

If you watch the following video, you will be able to see one of the world's leading card-throwing experts practicing his craft. With a business card and a flick of his wrist he can pop balloons, extinguish candles, hit targets, etc.:Around the 50-se ...

You Asked:How do ice breaking ships work? --- Chris, Reading, Penn.Marshall Brain Answers:An ice breaking ship has three things that help it do its job. First, it has a high-strength hull that is able to crash through ice that can grow up to 10 feet ...

You Asked:How do tattoo machines work? --- Jerry, Cave City, Ark.Marshall Brain Answers:The basic idea behind a tattoo machine is simple. You have an The needle is usually a needle bar with several needle points attached to it. You can see the needle ...