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A person holds an American flag during a naturalization ceremony on the ship ‘Wavertree’ in New York City. The 20 candidates were from 17 countries and 5 of the candidates were current or former members of the U.S. military.

Could you pass the civics portion of the U.S. citizenship test? Applicants must answer six of 10 questions correctly—and it’s harder than it sounds.

The Jhelum River Bridge, part of the ancient Grand Trunk Road passing through Punjab, Pakistan.

Some of the world’s oldest roadways are only memories now—but many have been preserved as historic monuments or improved to handle today’s traffic.

People in high-risk groups may want to consider a measles vaccine booster.

If you’re in a high-risk group, you may want to consider getting a booster for full protection against measles.

In space, it isn’t just number one and done.

Coming up with a practical way of replicating the earthbound poop experience took many years, many engineers, and a whole lot of ingenuity.

Houses in Californian cities fetch a high price.

Find out where home prices are the lowest and highest across the U.S.

The transfer of power passes through a lot of people. Can you put them in order?

This is a scene you might recognize from every police procedural ever.

And how you can tell a two-way mirror from a standard one.

Alexander the Great (left) with his tutor, Aristotle.

The names of logical fallacies often double as common expressions—but they don't always mean the same thing.

The spelling is a bit peculiar at times, too.

How well do you really know the U.S. Constitution? Discover things you might not have realized about this influential document, like its dictator-friendly loophole.

Here’s a delightful fun fact for you: a group of bears is called a sleuth! Can you sleuth out the dog hiding among these polar bears?

Take a look at which pasta sauces are most common in American kitchens.

Believe it or not, soda containers can change how the product tastes.

Ever wondered why canned soda tastes different from one in a plastic bottle? Learn how container materials impact flavor.

The film that launched Natalie Portman's career wouldn't have starred the future Oscar winner at all if her parents had gotten their way.

Keep them cozy and happy with a clean bed.

Keep your dog‘s bed fresh and safe with these cleaning steps and tips.

All five answers to the questions below have something in common. Can you figure it out?

Aldi has a good reason for charging a quarter to use carts.

Find out why Aldi‘s quarter system is a smart way to save money and ensure carts are always available.

Skype is name that didn’t originate in the dictionary.

From Skype to Etsy to Woot, the tech world is adept at formulating brand names from unexpected sources.

What has come to be known as International Women’s Day has been celebrated for more than 100 years.

Oregon‘s Mill Ends Park is no longer the smallest in the world. The title now belongs to a park in Nagaizumi Town, Japan.

The woolly devil—a recently identified plant species—has researchers intrigued because it belongs to a brand new genus.

Students don‘t have to break the bank with these deals.

College can be expensive, but these student discounts from popular retailers make life a little easier—and cheaper.

An illustration accompanying "The Haunted Cellar," published by Thomas Crofton Croker.

Here’s a crash course in these infamously impish creatures, from how to tell one from a leprechaun to which clurichaun stories are worth reading.

People with mind blindness cannot visualize things in their minds.

Aphantasia is a little-understood phenomenon that affects about 4 percent of the population. There are several theories behind what causes it.

The gray wolf is an endangered species in most of the U.S.

Where does your state rank when it comes to wildlife conservation?

Could You Pass the U.S. Citizenship Test?

8 Incredible Ancient Roads

Do You Need a Measles Vaccine Booster? Here’s What Experts Say

To Boldly Go: The Science Behind Pooping in Space

The 10 Most and Least Expensive U.S. Cities to Buy a Home

Do You Know the Presidential Line of Succession?

How Do Two-Way Mirrors Work?

5 Common Terms That Double as Logical Fallacies

21 Things You May Not Know About the U.S. Constitution

Can You Find the Dog Hiding Among the Polar Bears?

The Most Popular Pasta Sauces in the United States

What Makes Canned and Bottled Sodas Taste Different?

11 Expert Facts About ‘Léon: The Professional’

How to Clean Your Dog’s Bed—And Keep It Clean

What’s the Kennection? #157

Why Does Aldi Charge a Quarter to Use Their Shopping Carts?

The Origins of 8 Nonsensical Tech Names

6 Facts About International Women’s Day

Japan Is Now Home to the World’s Smallest Park

Introducing the Woolly Devil, the Newest Plant Discovered in Big Bend National Park

20 Companies That Offer Student Discounts

Meet the Clurichaun, the Leprechaun’s Lesser-Known (But Equally Impish) Cousin

What Is Mind Blindness?

The 10 Best States for Wildlife Protection