Dave Roos

Contributing Writer

Dave is a freelance journalist who has contributed hundreds of articles to HowStuffWorks since 2007. Raised in Pittsburgh, Pennsylvania, Dave attended Duke University where he earned the B.A. in comparative religious studies that has served him so well. Dave began freelancing when he and his wife moved to Mexico in 2003, publishing articles about Mexican food and culture in The New York Times, the Los Angeles Times and Newsweek. Nearly 15 years and three kids later, Dave and his family recently moved back to Mexico and just might stay a while.


RECENT CONTRIBUTIONS


A young inventor is launching a device aimed at cleaning up some of the debris in the Pacific Ocean Garbage Patch. But many conservationists are not impressed. Here's why.

Check out these five clever strategies financial experts suggest for saving a ton of money each year.

Apple's historic valuation had us wondering what $1 trillion is worth these days.

Federal law doesn't require Americans to have a fixed address in order to vote, but state and local laws often pile on additional restrictions that make it hard for the homeless to cast a ballot.

Nondisclosure agreements used to be stuffy legal documents reserved for safeguarding company secrets. Now they've been in the news as part of sexual harassment coverups. What are NDAs exactly and when can you break them legally?

SPF30 will protect more like SPF 15 if you don't apply as much sunscreen as the experts recommend. And a study showed that most people put on far too little. But what's the right amount anyway?

India's Supreme Court ordered the government to either tear down the Taj Mahal or spend the money to restore it properly. Why is repairing famous landmarks such an uphill battle?

There's a popular story that George Washington was offered the chance to be crowned king of the U.S. but it turned it down in support of a true republication government. But what really happened?

Although many people think the magician's assistant is just there for her looks, she (it's usually a "she") is often the brains behind the illusion.

Although Muslim-majority countries are often in the news, many people don't know that much about Islam. Here, we answer some often-asked questions about the world's second-largest religion.

You'd be surprised at some of the new tricks your old cellphones and smartphones can do.

Do you have trouble falling asleep or staying asleep? We'll give you the most common reasons why you're tired and how to fix them.

That friend/relative who said they only needed somewhere to stay for a few days is still on your couch a few months later. Getting them out legally might be harder than you think.

How this relatively small Southern city beat out the others to become 'Music City U.S.A.'?

Although we associate adoption mainly with children, there are many good reasons why one adult may adopt another. There are also some fraudulent ones too.

If you're considering a hobby or career as a "ufologist" or paranormal investigator, there are a handful of routes that don't involve being personally abducted or applying to a secret government shadow agency.

Why would anyone pay more than $100,000 for a cat that only exists in pixels? And what can these virtual kitties teach us about blockchain technology?

A surprising percentage of Americans believe that Big Pharma is hiding the cure for cancer because there's a lot of money to be made treating the disease. Experts explain why this isn't true.

Hurt feelings are likely to result but experts say there are times when you should leave more money to one child in your will. Just don't keep everyone in the dark about it.

Data privacy concerns have prompted some new laws to go into effect in the European Union — and that means changes for consumers in the rest of the world too.