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Denali (Mount Mckinley), Denali National Park, Alaska.

7 (or 8) Summits: The World’s Highest Mountains by Continent

Climbing each continent’s highest mountain is a major mountaineering...

Aerial view of road going along the mountain and ocean or sea. Drone photography from above

28 Places to See on Your California Road Trip

Know before you go.

Workers pressure cleaning rocks coated in oil from the Exxon Valdez oil spill, March 1990. In the intertidal zone, Prince William Sound, Alaska. pollution disaster

9 of the Biggest Oil Spills in History

Disasters of epic proportions.

Sea horse or Seahorse, Hippocampus. Kingdom: Animalia Phylum: Chordata, Class: Actinopterygii, Order: Syngnathiformes, Family: Syngnathidae, Subfamily: Hippocampinae

9 Fish Named After Other Animals

Evocative? Sure. Imaginative? Not really.

The Great Depression Unemployed men queued outside a soup kitchen opened in Chicago by Al Capone The storefront sign reads 'Free Soup

5 of the World’s Most Devastating Financial Crises

And you thought misplacing your wallet was a financial catastrophe…

French infantry coming into position at the Marne during World War I, 1914-18.

Battles of World War I

From Amiens to Ypres

Great White Shark

The 1916 Shark Attacks That Gave Sharks a Bad Rap

How humans and sharks became mortal enemies over the course of...

After a perfect launch, spectators try to catch a last glimpse of Space Shuttle Columbia, barely visible at the top end of the twisted column of smoke.

7 Accidents and Disasters in Spaceflight History

It doesn’t take rocket science to understand why space travel...

Florence, Italy Statue of David by Michelangelo

How a Rejected Block of Marble Became the World’s Most Famous Statue

Michelangelo turned an unfinished statue into an iconic piece...

Close up of saltwater crocodile as emerges from water with a toothy grin. The crocodile's skin colorings and pattern camouflage the animal in the wild.

7 Crocodilian Species That Are Dangerous to Humans

Do you know which species pose a threat to people?

Man and woman with substance induced mental disorder or psychosis, hallucination, hallucinogens, lsd, drugs

Investigating Therapeutic Uses for Hallucinogens

After a pause of several decades, scientists have resumed investigating...

"On the threshold of office--what have we to expect of him?" chromolithograph by Joseph Keppler, September 1881. Print shows the members of the assassinated James A. Garfield's cabinet looking at the new president, Chester Arthur. Chester A. Arthur.

The Surprisingly Disorderly History of the U.S. Presidential Succession Order

Who takes over and when?

Martin Luther King Jr. Memorial in Washington DC, USA. The memorial was opened in August 2011.

Attendees of Martin Luther King, Jr.’s Funeral

Find out who was who at Martin Luther King, Jr.’s funeral.

Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)

6 Important Mughal Emperors

Find out more about the rulers of the Mughal Empire.

Bonnie Parker mockingly points shotgun at Clyde Barrow. American bank robbers and lovers Clyde Barrow (1909 - 1934) and Bonnie Parker (1911 -1934), popularly known as Bonnie and Clyde, circa 1933. criminal, thief, robbery team

7 Notorious Women Criminals

Sugar, spice, and everything nice? Think again.

4:045 Dinosaurs: Monsters of the Past, Tyrannosaur, Trachodon, Triceratops

A Journey Through Time Since the Precambrian

A great primer for your time-machine travels.

Frost. Frost point. Hoarfrost. Winter. Ice. Blackberry plant. Thorn. Hoarfrost on blackberry thorns.

Botanical Barbarity: 9 Plant Defense Mechanisms

These plants will cut you.

National Library, Buenos Aires, Argentina

9 Architectural Landmarks in Buenos Aires

Know before you go.

American troops at the front in Italy. American soldiers on the Piave (river) front hurling a shower of hand grenades into the Austrian trenches, Varage, Italy; September 16, 1918. (World War I)

Leaders of World War I

Learn more about the leaders of World War I.

The Cathedral of Saint Paul in Minnesota. The Italian Renaissance church, built in 1915, is styled after St. Peter's in Rome.

To All Nations: 8 Fascinating Jesuit Missionaries

They came, they taught, they converted.

A soldier standing guard in a Washington, D.C. street with the ruins of buildings that were destroyed during the riots that followed the assassination of Martin Luther King, Jr., April 8, 1968.

There’s a Riot Goin’ On: Riots in U.S. History (Part Two)

Unlawful assemblies to remember.

Planet Jupiter with its moon Io at left, photographed by the Cassini orbiter during the Cassini-Huygens mission, 2000. spacecraft

7 Important Dates in Jupiter History

The largest planet in our solar system has had some pretty big...

Background: abstract bubble planets with clouds. astrology, astronomy, atomosphere, big bang, bubbles, fantasy, future, galaxy, universe, stars

9 Ghostly Planets

Were they ever out there to begin with?

Specially designed Cassini orbits place Earth and Cassini on opposite sides of Saturn's rings, a geometry known as occultation. Cassini conducted the first radio occultation observation of Saturn's rings on May 3, 2005. (solar system, planets)

10 Places to Visit in the Solar System

Having a tough time deciding where to go on vacation? The solar...