1

Coca-Cola vs. Pepsi

The "Cola Wars" have been going on for decades, but it seems that there’s no resolution in sight. In the late 1970s, both companies started directing their marketing campaigns against each other, with mixed results , though Coca-Cola always seems to be half a step ahead of Pepsi. They have both gained a loyal following, but the war remains as strong as ever.

2

Hamilton vs. Burr

Political rivalries are not uncommon in America, but few include a deadly duel involving a sitting vice president. The animosity between Alexander Hamilton and Aaron Burr intensified after Burr won a Senate seat from Hamilton’s father-in-law, Philip Schuyler. During the presidential election of 1800 and the New York gubernatorial election of 1804, Hamilton actively supported candidates opposing Burr. Deeply angered by Hamilton’s continued opposition and public criticism, Burr challenged him to a duel, and the rest is history.

3

Yankees vs. Red Sox

Sports fans are dedicated, but few rivalries match the intensity of those who support the New York Yankees and the Boston Red Sox. They have been rivals since their first meeting more than 120 years ago, with the Yankees often being perceived as a dominant team, while the Red Sox filled the role of the underdog . Their enmity deepened dramatically in 1920, when Babe Ruth was sold to the Yankees. What followed was an 86-year championship drought for Boston, popularly known as the "Curse of the Bambino," which the Red Sox finally broke in 2004.

4

Miami vs. Tampa

Can a sandwich cause a rift between two cities? It sure can. Cuban sandwiches are a Floridian staple , and their construction is often considered set in stone: ham, roast pork, Swiss cheese, pickles, and mustard on Cuban bread, served pressed. Unless you live in Tampa. There, a strong Italian influence has translated into the addition of Genoa salami to the Cuban sandwich, much to the outrage of their Miami neighbors.

5

Mark Twain vs. USPS

Renowned writer Mark Twain had no qualms about criticizing the things he disliked, and he surely disliked the United States Postal Service . He thought it costly, inefficient, and overregulated, and he made sure to let everyone know in articles, complaint letters, and conversations with influential figures. In a poetic turn of events, the USPS released a Mark Twain commemorative stamp in 2011.

6

Hatfields vs. McCoys

One of the most infamous feuds in American history, the rivalry between the Hatfield and McCoy families shook the West Virginia-Kentucky area for three decades . Starting with the murder of a McCoy who was returning home from war, the hostilities and deaths escalated to a point where the Supreme Court was forced to intervene.

7

Edison vs. Tesla

Many inventors were involved in the so-called "War of the Currents," waged on electric power systems, but Thomas Edison and Nikola Tesla are the most remembered. Edison championed direct current (DC) electrical systems, which operated at relatively low voltages and were suited to short-distance distribution. Tesla, working with George Westinghouse, promoted alternating current (AC), which could be transmitted over long distances more efficiently. Despite Edison’s strong campaign to discredit AC and its proponents, it ultimately became the standard power system.

8

Joan Crawford vs. Bette Davis

Rivalries are everywhere in the film industry, but some become the stuff of legends. Allegedly, the feud between Joan Crawford and Bette Davis was never as intense as portrayed. While the two actresses did clash at times over personality differences, professional competition, and rumored romantic entanglements, much of the rivalry’s enduring reputation was fueled by gossip columns and sensational press coverage. And their respective film studios took advantage of it.

9

Burger King vs. McDonald’s

The fast-food industry has always had McDonald’s as one of its key players, but other companies have given their all to take that position. Burger King is one of McDonald’s oldest challengers , and has repeatedly tried to influence their customer base through a series of aggressive and often tongue-in-cheek marketing campaigns. While other brands, such as Wendy’s or Five Guys, have dipped their toes in the "Burger Wars," McDonald’s and Burger King remain two of the biggest names in the industry.

10

Edgar Allan Poe vs. Rufus Wilmot Griswold

While Poe looms far larger than Griswold in the modern American mind, much of what the public believes about the "Nevermore" poet was influenced by his rival . Their feud began with the publication of a poetry anthology by Griswold, which displeased Poe due to its contents and criticism of his own poetry. The animosity intensified when they both vied for the same editorial position and, reportedly, the affections of the same woman. After Poe’s death, Griswold wrote an obituary and a biography filled with attacks and slander, which contributed to the idea of Poe as a drunkard and a madman.

1

Jackie Kennedy (1961–1963)

Jackie Kennedy brought elegance, culture, and a whole lot of style to the White House. But she was much more than a fashion icon : She led a historic restoration of the White House and made sure Americans saw it as a true national treasure through a famous televised tour in 1962.

Her poise during the devastating days following her husband’s assassination gave the country something to hold onto in a time of profound national grief.

2

Eleanor Roosevelt (1933–1945)

Eleanor Roosevelt completely redefined what a First Lady could be . She held press conferences, wrote a daily newspaper column, traveled the country during the Great Depression, and pushed her husband, Franklin Delano Roosevelt, hard on civil rights.

After President Franklin died, she kept going, serving as a U.S. delegate to the United Nations and helping to draft the Universal Declaration of Human Rights. Simply put, she is the gold standard of First Ladies.

3

Betty Ford (1974–1977)

Betty Ford was refreshingly honest for a First Lady. She spoke openly about her breast cancer diagnosis at a time when people barely dared to whisper the word, and her candor is credited with encouraging countless women to get mammograms.

After leaving the White House, she went public about her struggles with substance abuse and founded the Betty Ford Center, which has helped thousands of people get sober over the years. She turned personal hardship into public good .

4

Dolley Madison (1809–1817)

Dolley Madison turned the White House into a lively gathering place. She also used her dinner parties to help James Madison smooth over political feuds that might otherwise have blown up.

Her most famous moment was when the British invaded in 1814 and set the White House on fire, and Dolley stayed behind just long enough to save a portrait of George Washington .

5

Edith Wilson (1915–1921)

When President Woodrow Wilson suffered a severe stroke in 1919, Edith didn't just stand by his side: she basically ran the show . She controlled who could see the president, filtered his communications, and made key decisions about what information reached him. In a time when women couldn't even vote yet, Edith Wilson played a key role in keeping the nation afloat during her husband's sickness.

6

Mary Todd Lincoln (1861–1865)

Mary Todd Lincoln had one of the hardest roles any First Lady has ever faced: supporting a president through the Civil War while grieving the death of their son. She was sharp, opinionated, and deeply involved in her husband Abraham's presidency.

While she was often criticized during her time by political opponents, history has been kinder to her, recognizing that she was a complex, intelligent woman navigating an almost impossible situation.

7

Lou Henry Hoover

Lou Henry Hoover brought an intellect to the White House unlike almost any First Lady before her during Herbert Hoover's presidency (1929-1933). A Stanford-educated geologist who spoke five languages, she was an accomplished woman in her own right at a time when that was genuinely rare . When the Great Depression hit, she used her own personal funds to quietly help White House staff and struggling families, often anonymously.

Her most lasting legacy was her passionate dedication to the Girl Scouts of America. She championed the idea that young women deserved the same opportunities for outdoor education and leadership development as young men, and she funded troops in underserved communities. In 1933, she became the first First Lady to deliver a solo nationwide radio broadcast, using the platform to call on Americans to support their neighbors during the crushing hardships of the Depression.

8

Lady Bird Johnson (1963–1969)

Lady Bird Johnson championed the Highway Beautification Act of 1965 , a landmark piece of legislation that regulated billboards and junkyards along federal highways and promoted the planting of native wildflowers across the country. She worked closely with the National Park Service , helped establish or improve numerous parks and green spaces, and brought conservation to the center of the national conversation at a time when few politicians were willing to do so.

She also ran the White House with great skill and was a key behind-the-scenes supporter of Lyndon B. Johnson’s ambitious Great Society programs.

9

Abigail Adams (1797-1801)

Long before women had the right to vote, Abigail Adams was already telling her husband to "remember the ladies", and she meant it. She was one of the most politically engaged women of her era, writing sharp, witty letters to John that were basically unofficial policy memos.

She's often considered America's first truly political First Lady, and she was ahead of her time by about 150 years .

10

Edith Roosevelt

Edith Roosevelt transformed the role of First Lady during Theodore Roosevelt's presidency (1901–1909), turning it into something closer to what we recognize today. Edith created a formal staff, managed the White House's finances, and oversaw its major renovation in 1902 , which gave the building its now-iconic East and West Wings.

She was also a master of image control , carefully curating which photographs of her family reached the press and keeping the famously boisterous Roosevelt children from becoming a public relations liability. Behind closed doors, she was one of her husband Theodore's most trusted advisors, and many historians believe her steady judgment was a quiet but powerful force throughout his presidency.

1

Grizzly Bear

Image: Joshua J. Cotten

Grizzly bears ( Ursus arctos horribilis ) are one of the most famous North American mammals, but do you know why they are called that? The grizzly bear is a subspecies of the brown bear. However, although grizzlies are mostly brown, their fur can appear white-tipped or grizzled , which explains their name.

The grizzly bear once lived throughout much of the North American West. Unfortunately, the arrival of Europeans gradually drove it from its original habitat, considerably reducing its population. In 1975, they were listed as threatened under the U.S. Endangered Species Act, and much has been done since then to protect the species. Today, grizzlies can still be found in parts of Wyoming, Montana, Idaho, Washington, and the Alaskan wilderness. They are also one of the most iconic residents of Yellowstone National Park.

2

Gray Wolf

Image: Yannick Menard

We all know that wolves are legendary for their eerie howl, but there are many other interesting facts about this peculiar animal. Gray wolves ( Canis lupus ) are the largest members of the dog family and are native to North America and Eurasia. The size of an adult gray wolf is similar to that of an average dog and it can weigh up to 145 pounds. However, their tracks would outshine those of any dog, as they measure about 5 inches long by 4 inches wide.

Wolves live and hunt in packs of 6 to 10 animals. They are known to travel great distances, even covering 30 miles in a single day. In the United States, gray wolves were hunted to near extinction, although some populations survived and others have since been reintroduced. Today gray wolves can be found in areas such as the Great Lakes states of Minnesota, Wisconsin, and Michigan, the northern Rocky Mountains region, and the northwest.

3

North American River Otter

Image: lovelooking

The North American River Otter ( Lontra canadensis ) is a species of semi-aquatic, carnivorous mammal endemic to the North American continent that can be found along the coasts and rivers of the United States and Canada. Because they are very susceptible to environmental pollution, their population has been reduced considerably in recent years.

It is a mostly nocturnal animal, often seen at dusk or dawn. During the day it takes refuge in burrows with an underwater entrance that leads to a nest chamber lined with plant material and hair. North American River Otters are robust (11 to 31 pounds) and feed on fish and other aquatic prey, such as turtles, frogs, and crabs.

4

Red Fox

Image: Jeremy Hynes

The red fox ( Vulpes vulpes ) is a species of mammal in the canid family. It is the most abundant fox species in the northern hemisphere and can be found in many national parks across the country. As its name suggests, its fur is reddish in color. The tips of the ears and the ends of the legs, however, are black. They have a bushy tail whose tip is usually white, as is their belly.

Although classified as a carnivore, the red fox is actually an omnivore and, above all, a great opportunist. They are astute, have excellent eyesight, and have a keen sense of smell and hearing. They can hunt prey of a wide variety of sizes, from insects and worms to small mammals, birds, and fish. They also feed on certain vegetables, berries, and fruits.

5

Mountain Lion

Image: Robert Sachowski

The cougar ( Puma concolor ), also known as the mountain lion, is a mammal native to the Americas. These large, tan cats are found from the Yukon in Canada to the southern Andes Mountains and Patagonia in South America. In the United States, mountain lions can be found mainly in the western part of the country. However, because of their solitary nature and constant threats from humans, it is difficult to estimate exact population numbers.

Mountain lions are slender and agile felines that can adapt to different conditions and environments. They are strict carnivores and have extraordinary vision and acute hearing, which allows them to capture almost any animal, from insects to squirrels, beavers, elk, and deer.

6

North American Beaver

Image: kidmoses

Beavers are known to be one of the only animals that can affect the ecosystem around them, building watertight dams that help preserve water in streams and rivers. The North American beaver ( Castor canadensis ) is the largest rodent in North America and one of the largest in the world —it can weigh between 24 and 71 pounds! The species is widely distributed throughout the continent, from northern Canada to northern Mexico.

The North American beaver's coat can range from dark brown to reddish brown, and its most distinctive feature, a flattened paddle-shaped tail, allows it to swim. It is perfectly adapted to semi-aquatic life; its ears and nose have valves that close when submerged, and it can close its lips behind its prominent incisors to cut wood underwater.

7

Hawaiian Monk Seal

Image: Sebastian Coman Travel

The Hawaiian Monk Seal ( Neomonachus schauinslandi ) is a species native to the Hawaiian Islands. With its friendly face and long whiskers, it is perhaps one of the most endearing mammals that can be found in our country. Unfortunately, this seal species is endangered because of the large amount of chemical waste produced by the fishing industry on the reefs and beaches of the northern Pacific Ocean.

The Hawaiian Monk Seal is usually solitary but is always seen accompanied by other specimens. It is known to be piscivorous, that is, it feeds mainly on fish and other marine creatures, such as crustaceans and some species of mollusks. Since it is a predator by nature, when hunting it makes the most of its length (approximately 7 feet) and its large body (between 300 to 600 lb) to catch its prey.

8

American Red Squirrel

Image: Rusty Watson

The American red squirrel ( Tamiasciurus hudsonicus ) lives in the United States and much of Canada. It is a rodent mammal easily recognized for its deep reddish fur, long bushy tail, and prominent lower teeth. It can be differentiated from other North American squirrel species because of its smaller size, 11 to 14 inches.

American red squirrels normally live in the shady areas of coniferous forests and are primarily granivores. They feed on seeds, pine cones, nuts, fruit, and occasionally insects, eggs, and birds. It is mainly active in trees but also swims freely, using its tail as a rudder to change its direction.

9

Elk

Image: Judy Beth Morris

Elk ( Cervus canadensis ), also known as wapiti in several Native American cultures, is a species of deer that lives in North America, Central and East Asia. Today, most elk in our country are found primarily in the West, especially in mountainous regions such as Wyoming's National Elk Refuge and Yellowstone National Park. Some eastern states have also reintroduced small herds into natural forest areas.

The most prominent feature of elks is their massive antlers. Each March they shed their antlers, which begin to grow back in May to be ready for the breeding season in late summer. During this time the bellowing of the males echoes through the mountains, announcing the violent battles that serve to decide who mates with whom. The males with the largest antlers, usually the oldest, often win these duels and get to dominate the herd.

10

American Bison

Image: Stephen Leonardi

The American bison is a true symbol of American identity. Not only is it the largest mammal in North America, it is also the national mammal of the United States. In addition, it's one of the greatest conservation success stories of all time.

In prehistoric times, there were millions of specimens of American bison ( Bison bison ) roaming our territory. But by the late 19th century, there were only a few hundred left. Fortunately, thanks to the efforts of several organizations and individuals, the species was reintroduced and today it can be found in a few national parks and reserves as well as in the wild.