Dave Roos

President Wilson and Congress sought to silence vocal and written opposition to U.S. involvement in the war.

The travel document has changed in both function and appearance over the centuries.

These are main theories surrounding what happened to the legendary aviator and her navigator.

The best horror movies hold up a mirror to our collective fears and taboos.

Meteors, comets and asteroids have slammed into the Earth with a force many times greater than the most powerful nuclear bombs.

These frozen space travelers captured the world's attention.

The first version of a magnifying lens dates back more than 2,700 years ago.

30,000 Hessians fought for the British during the Revolutionary War.

What did they eat at the first Thanksgiving? Which president made Thanksgiving a federal holiday? Get Thanksgiving trivia to share around the table.

From the earliest fall feasts to the first Thanksgiving football game to the Macy's Day parade, here's the full background on how the U.S. holiday evolved to the tradition it is today.

Joining the Axis powers proved to be a terrible miscalculation.

The empire's road system may have covered nearly 200,000 miles.

In Athens and Rome, voting could entail shouting contests, secret stone ballots and an election system with built-in bias for the wealthy.

The Constitution says the president must get paid, but Congress decides how much.

No constitutional limits existed for U.S. presidents until 1951.

For more than 200 years, the White House has been a work in progress.

Some abdicated for love—others did it for survival.

New studies combined archaeological data with oral history to figure out why everyone left.

The mafia often had a hand in the game fixing and inside betting.

Ilse Koch was accused of committing atrocities at the Buchenwald concentration camp.

Neolithic people were making and eating yogurt—or something like it—at least 8,000 years ago.

Heard of ‘6-7’? Here are nine other numbers from history that became shorthand for cultural phenomena.

One storm left an estimated 8,000 dead in its wake, while an epic flood carried human bodies some 350 miles away.

When Aaron Burr set off to claim lands in the Southwest, President Thomas Jefferson intended to stop him.

Archaeologists have found remarkable human-made objects dating back hundreds of thousands (and even millions) of years.

These leaders made history by living according to Stoic principles.

James Madison wrote the amendment to assure that the newly drafted Constitution would not trample on states' or individuals' rights.

The Founding Fathers had to compromise when it came to devising a system to elect the president.

The phrase that suggests a failure to pick up on social cues has been around for at least 50 years.

The legendary medicine man and guerrilla warrior was so expert at eluding the enemy, he was considered to be protected by supernatural powers.

The U.S. capital was vulnerable at the start of the war, but soon was fortified with forts, trenches, gun batteries and even river obstructions.

The historic visit by President Richard Nixon to the People's Republic of China warmed relations between the two nations and substantially altered the balance of power between the U.S., China and the Soviet Union.

Cereal magnate John Harvey Kellogg usually gets credit, but there are other contenders.

Incredibly, there are roads dating back millennia that are still in use.

Printed just weeks after British troops opened fire on an unarmed crowd of Bostonians, Revere’s depiction of the melee likely stoked anti-British sentiment throughout the colonies.

The 1798 Alien and Sedition Acts called for deportation of people from 'hostile' nations and made it a crime to criticize the government.

With the Aqua-Lung, the French oceanographer and filmmaker realized his dream of creating a system to swim and breathe freely underwater.

Before the Department of Defense, the U.S. had a Department of War and a National Military Establishment.

That classic boxcar design evolved from horse-drawn wagons.

The attacks of 9/11 shocked the nation—and led to changes that altered U.S. government, travel and culture.

Eisenhower installed 'elevator music' in the White House and NASA used it in astronaut training, but its inventor came up with many other, more impactful inventions in his lifetime.

Electric vehicles were some of the earliest automobiles ever invented—and, unlike early gas-powered cars, they didn't require a crank to start the engine.

They have actually been around since ancient times.

Lamarr was a glamorous movie star by day, but she was also a gifted, self-trained inventor who developed a technology to help sink Nazi U-boats.

Some of the modern world's most groundbreaking technologies emerged during this 30-year period.

In the first half of the 20th century, U.S. educators shunned homework. The Soviet Union’s launch of Sputnik 1 changed that.

The Posse Comitatus Act addressed Southern politicians' objections to military enforcement of Reconstruction following the Civil War.

Flag burning has long tested the limits of freedom of speech.

A 40-hour, five-day work week is now standard for full-time jobs in America, but that wasn't true until the 1930s.

The once-great empire on the Nile was slowly brought to its knees by a centuries-long drought, economic crises and opportunistic foreign invaders.

Although Montana is the fourth-largest U.S. state by area, it's also one of the least densely populated states.

Maine is the largest state in New England and forms the northeast border of the United States with Canada. It has been a state since 1820.

“The Old Line State” is known for its diverse geography and crucial role in the nation’s history.

The state is one of the nation's top producers of wine, hazelnuts and Christmas trees.

Idaho farmers produce more potatoes and trout than any other state in the nation

Pennsylvania was founded by William Penn as a haven for his fellow Quakers.

Kansas, situated on the American Great Plains, became the 34th state on January 29, 1861. Its path to statehood was long and bloody.