7 Wonders of the Ancient World:The Great Pyramids of Giza

December 17th, 1903, Kittyhawk, North Carolina: The World's first flight with Orville Wright at the controls. His brother Wilbur is running at the side of the machine.

Colonial schoolroom scene showing teacher and students. Painting by Curran.

The Declaration of Independence Was Also a List of Grievances

White House. (Credit: Bettmann/Getty Images)

Athena presides over the voting for the award of the arms of Achilles, c. 490 BC. Found in the collection of the Art History Museum, Vienne. Artist Duris (Douris), (Vase painter) (ca. 505-465 BC). (Photo by Fine Art Images/Heritage Images via Getty Images)

Excavated ruins of ancient city of Babylon in Mesopotamia, Iraq

This April 1968 file photo shows the first sergeant of A Company, 101st Airborne Division, guiding a medevac helicopter through the jungle foliage to pick up casualties suffered during a five-day patrol near Hue.

Exterior of Supreme Court of the United States on First Street in Washington, D.C., with statue by James Earle Fraser titled Authority of Law.

Illustrated bookplate of Hessian soldiers in their 1784 uniforms. Printed in the book, "Armée Hessoise" by JH Carl & JC Muller in 1805. Artist J.H. Carl, 1784.

A drugstore clerk removes Tylenol capsules from the shelves of a pharmacy on September 30, 1982 in New York City after reports of tampering. Seven people died in Chicago after taking Tylenol.

Dave Roos is a freelance writer based in the United States and Mexico. A longtime contributor to HowStuffWorks, Dave has also been published in The New York Times, the Los Angeles Times and Newsweek.&nbsp;

Dave Roos

Dave Roos is a freelance writer based in the United States and Mexico. A longtime contributor to HowStuffWorks, Dave has also been published in The New York Times, the Los Angeles Times and Newsweek.&nbsp;

Dave Roos Archives | History.com

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HISTORY

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History

America’s Founding Fathers decided that one elected civilian - the U.S. president - would lead the executive branch of the federal government, a governmental structure that has remained in place for more than 200 years.

U.S. Presidents

Colonial America was a vast land settled by Spanish, Dutch, French and English immigrants who established colonies such as St. Augustine, Florida; Jamestown, Virginia; and Roanoke in present-day North Carolina.

Colonial America

The U.S. government, with its three branches of government and a system of checks and balances, is responsible for governing the 50 states and all districts and territories of the United States.

US Government

Halloween evolved from the ancient Celtic holiday of Samhain. Over the centuries, Halloween transitioned from a pagan ritual to a day of parties, costumes, jack-o-lanterns and trick-or-treating for kids and adults.

Halloween

The fight for women's rights and women's suffrage, which predated the famous Seneca Falls Convention of 1848, is one of the most important civil rights struggles in U.S. history.

Women's Rights

The gay rights movement is the struggle for equality and marriage rights for gay, lesbian and transgendered people. Milestones include the Stonewall Riots, the trial of Oscar Wilde and the assassination of Harvey Milk.

Gay Rights

The Vietnam War pitted communist North Vietnam and the Viet Cong against South Vietnam and the United States. The war ended when U.S. forces withdrew in 1973 and Vietnam unified under Communist control two years later.

Vietnam War

The Roman Empire, led by rulers such as Julius Caesar, Augustus Caesar, Caligula and Nero, was a vast and powerful domain that gave rise to the culture, laws, technologies and institutions that continue to define Western civilization.

Ancient Rome

The civil rights movement was a struggle for justice and equality for African Americans that took place mainly in the 1950s and 1960s. It was led by people like Martin Luther King Jr., Malcolm X, the Little Rock Nine and many others.&nbsp;

Civil Rights Movement

From religious and patriotic observances to celebrations of ethnic pride, explore the history of Halloween, Christmas, Easter, Thanksgiving, St. Patrick's Day, New Year's Day, Valentine's Day, Memorial Day and more.

Holidays

Inventors

The Revolutionary War waged by the American colonies against Britain influenced political ideas and revolutions around the globe, as a small fledgling nation won its freedom from the greatest military force of its time.

American Revolution

Inventions from the telephone to the Model T and the computer have defined human history, and inventors like Leonardo da Vinci, Nikola Tesla, Thomas Edison, Eli Whitney and Alexander Graham Bell have transformed our society.

Inventions & Science

February is dedicated as Black History Month, honoring the triumphs and struggles of African Americans throughout U.S. history, including the civil rights movement and their artistic, cultural and political achievements.

Black History

Today's world owes an immense debt to the mighty empires and great cities of ancient history. Their inventions and ideas enabled the advancement of human society and laid the foundation for modern life.

Ancient History

Though the 19th century saw the rise of populism, the labor movement and Jacksonian democracy, it also ushered in the Gilded Age, when men like Cornelius Vanderbilt and J. P. Morgan wielded control over politics and business.

19th Century

During the 1980s, conservative politics and Reaganomics held sway as the Berlin Wall crumbled, new computer technologies emerged and blockbuster movies and MTV reshaped pop culture.

1980s

The U.S. Constitution, signed on September 17, 1787, created America’s federal government, established fundamental laws and legal structures while guaranteeing certain basic rights for American citizens.

Dave Roos ‑ Stories

How People Voted in Ancient Elections

9 Fascinating Finds From King Tut’s Tomb

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8 Landmark Supreme Court Cases That Were Overturned

How the 1982 Tylenol Poisonings Nearly Canceled Halloween

Why Germans Fought in the Revolutionary War—for the British

What School Was Like in the 13 Colonies

What Caused Ancient Egypt’s Decline?

7 Gilded Age Inventions That Changed the World

What Was Life Like in Ancient Babylon?

The Declaration of Independence Was Also a List of Grievances

7 Iconic Photos From the Vietnam War Era