Studies have shown that prayer has a positive effect on individuals, but can your prayer heal someone else? Check out this HowStuffWorks podcast to find out how science weighs in on the power of intercessory prayer -- and if it should at all.

Prices in a free market are determined by the law of supply and demand, yet the US government has recently given billions of dollars to rescue large corporations. Check out this HowStuffWorks podcast to learn whether or not the US is still a free market.

Due to the region's elevation, the average traveler to Tibet often experiences altitude sickness -- a condition caused by a lack of oxygen in the blood. Check out this HowStuffWorks podcast to learn how Tibetans have adapted to life in high altitudes.

The economy imploded as US banks reaped the consequences of subprime mortgage trades. Controversially, Congress has provided emergency funding for the banks. Learn more about the agreement between Washington and Wall Street in this HowStuffWorks podcast.

If you're tired of paying utility bills or relying on fossil fuels, it might be time to consider living off the grid. Check out this HowStuffWorks podcast to learn more about the techniques and strategies used by people living off the grid.

Is Earth due for a mass extinction? Population ecologists think so. Check out this HowStuffWorks podcast to learn more mass extinctions.

Cannibalism is one of humanity's near-universal taboos, but it has been practiced in widely varying circumstances throughout history. Check out this HowStuffWorks podcast to learn the difference between the three types of cannibalism.

Entomophagy -- the practice of eating insects -- is common outside of Europe and North America. Despite cultural taboos, you've probably eaten insects without knowing it. Check out our HowStuffWorks podcast to learn more about entomophagy.

In China's Guangdong province, twelve volunteers have been trained to detect harmful pollution by using their sense of smell. Check out this HowStuffWorks podcast to learn more about China's pollution sniffers.

With the world's best weaponry, a shadowy legal status, and almost no oversight, Delta Force is the stuff of military legend. Check out this HowStuffWorks podcast to learn why Delta Force was created, and how this group works.

Graceland attracts millions of visitors every year. Check out this HowStuffWorks podcast to learn more about Elvis and Graceland, which Elvis bought when he was only 22 years old.

Everyone knows it's tough to quit smoking -- but did you know quitting can be contagious? Check out this HowStuffWorks podcast to learn more about smoking.

Everyone dreams of snagging a fresh start at life. Whether you've thought of changing your dull given name, or just disappearing entirely, this HowStuffWorks podcast will tell you what it takes to erase your identity.

The ultimatum game is an economics experiment that provides insight into the human psyche. Check out our HowStuffWorks podcast to learn about the rules to the ultimatum game.

Humanity has adapted to life on the surface. We like sunlight and fresh air -- but do we need it to survive? Check out this HowStuffWorks podcast to learn more about living underground.

Sleep is one of those funny things about being a human being -- you just have to do it. Have you ever wondered why? Check out our HowStuffWorks article to learn more about the importance of sleep.

The function of antiperspirant and deodorant is to prevent sweat or to mask the scent of body odor. Learn about the function of antiperspirant and deodorant in this HowStuffWorks podcast.

But there's no consensus among professionals about which method of death is the least desirable. A person's fears may factor into his own personal worst way to die. Check out our HowStuffWorks article to learn more about the worst way to die.

With the benefit of wireless technologies like cell phones and text messaging, large groups of people are able to coordinate their actions with amazing precision. Check out our HowStuffWorks article to learn about smart mobs and civil disobedience.

Some researchers believe that weddings between a human and a robot could be possible by the year 2050. Take a look at our HowStuffWorks article to learn more about robot rights.

High blood pressure -- or hypertension -- is elevated pressure of the blood in the arteries. Hypertension results from two major factors. Check out our HowStuffWorks article to learn more about the causes of and treatment for hypertension.

Are humans born with survival instincts? Check out our HowStuffWorks article to learn more about human instincts and survival.

Ten terribly bungled crimes throughout history are explored, such as drug deals gone wrong. Find out which ones are at the top of the list for Josh and Chuck in this HowStuffWorks podcast.

In May of 2007, the US military found drawings believed to be part of an Al-Qaida torture manual. However, the seminal manuals on torture are believed to be the work of the CIA. Check out our HowStuffWorks article to learn more about torture manuals.

The 1996 Chuck Palahniuk novel, "Fight Club," has been blamed -- and lauded -- by various groups for inspiring several real-life fight clubs. Take a look at our HowStuffWorks article to learn more about real-life fight clubs.