Dave Roos

Dave Roos

Contributing Writer

Dave is a freelance journalist who has contributed hundreds of articles to HowStuffWorks since 2007 reporting on every topic under the sun: history, culture, politics, economics, technology, religion and more. He’s also a regular contributor to History.com and a writer/researcher for Stuff You Should Know.

Raised in Pittsburgh, Pennsylvania, Dave attended Duke University where he earned a B.A. in comparative religious studies and more importantly met his amazing wife Mandy. They have three kids and live in Boise, Idaho.


Recent Contributions

The pink and white blooms of the cherry blossom tree often herald the arrival of spring. But in Japan, the cherry blossom is also a well-loved symbol of fleeting beauty, nostalgia and loss.

By Dave Roos

If you're able to stream content while wandering large areas, feel free to thank mesh wifi! But what is mesh wifi, exactly? Read on to explore how wireless mesh networks deliver high-speed internet connectivity anywhere, anytime.

By Chris Pollette & Dave Roos

Why do we love looking at a perfectly stacked display of soup cans or six flower petals around a stamen? Our brains seem wired for it -- but why?

By Dave Roos

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Before the widespread use of DNA, establishing the paternity of a child was a tricky business. Ever heard of the oscillophore?

By Dave Roos

Your computer is working slower than molasses, but why? We look at five of the most common reasons and how to fix them, with the help of experts.

By Dave Roos

But that doesn't mean they worshipped them.

By Dave Roos

To U.S. taxpayers, April 15 comes with lots of scrambling and sweating to send some cash or paperwork to the IRS. But why does Tax Day fall on that particular date? And why is it on April 18 sometimes?

By Dave Roos

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It was the world's largest diamond when mined and today it's cut into nine gems that are all part of the British Crown Jewels. But since the death of Queen Elizabeth II, questions have emerged about its imperialist history.

By Dave Roos

It's been some 15 years in the making and is still under construction. What's the real story behind the Jeddah Tower's delay?

By Dave Roos

Hummmmmm. Annoyed yet? Imagine if you heard that sound every night no matter what you did. Likened to a diesel engine idling in the distance, the Hum is a sound some people can never get away from. It's even caused suicide. But is it real?

By Dave Roos

Whether from a clerical error or an improperly offered bonus, sometimes you end up with a fatter paycheck than you're supposed to get.

By Dave Roos

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Nutty Putty Cave, near Salt Lake City, Utah, was discovered in 1960 and sealed up forever in 2009. But why?

By Dave Roos & Austin Henderson

This fall festival is about food, faith, lights and gifts. But please don't call it an Indian Hanukkah.

By Dave Roos

What if there are colors within the visible spectrum that our brains can't perceive? In fact, there are. They're called impossible colors. But some researchers think they've discovered a way to see the impossible.

By Dave Roos

From astronauts to doctors to an archaeologist, we present eight scientists whose contributions to science, engineering and math were inseparable from their identities as Indigenous Americans.

By Dave Roos

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Let's take a look at some of the strongest metals on Earth and their surprising uses.

By Dave Roos & Sascha Bos

This is one 'supermaterial' that might actually live up to its hype. So what is graphene really, and why is it so versatile?

By Dave Roos & Austin Henderson

Whether the circle is as big as planet Mars or as small as a tennis ball, the ratio of its circumference divided by its diameter will always equal pi (3.14). But why?

By Marshall Brain, Dave Roos & Austin Henderson

The United States Secret Service provides 24/7 protection for the wives and kids of the U.S. president and vice president, including their adult children. But why do a president's children get protection?

By Dave Roos

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The numbers 666 are a favorite of horror movies dealing with the occult. But where did they come from, and what or whom do they really refer to?

By Dave Roos

In 1977, SETI volunteer Jerry Ehman saw a transmission so exciting he circled it on paper and wrote the word "Wow!" It seemed to indicate a message from outer space. But what was it really?

By Dave Roos & Austin Henderson

Is the U.S. a democracy or a republic? Or both? And what's the difference, anyway?

By Dave Roos

The books that make up the Bible were written over a span of 1,000 years. During that time, many other religious writings were also produced. So, who decided which would be part of the Bible and which would be left out?

By Dave Roos

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How does a hurricane become a Category 5 and what's it like to live through it? Those who have say you don't want to know.

By Dave Roos

Do you hold your breath when you're driving through a tunnel? HowStuffWorks looks at a survey exploring driving superstitions.

By Dave Roos