'Through this unique means, I convey to you and all mankind, America’s wish for peace on Earth and goodwill to men everywhere.'

'On the return trip home, gazing through 240,000 miles of space toward the stars and the planet from which I had come, I suddenly experienced the universe as intelligent, loving, harmonious..'

-Apollo 14 astronaut Edgar Mitchell, in "The Way of the Explorer"

'We become not a melting pot but a beautiful mosaic. Different people, different beliefs, different yearnings, different hopes, different dreams.'

- President Jimmy Carter (1924-2024)

Franklin D. Roosevelt's 1941 speech framed World War II as a global fight for universal rights

Eleven months before the attack on Pearl Harbor, President Roosevelt outlined four fundamental freedoms that, in his words, people "everywhere in the world" ought to enjoy—speech, worship, freedom from want, and freedom from fear.

Watch President John F. Kennedy's speech on going to the moon

'There are no passengers on Spaceship Earth. We are all crew.'

- Philosopher Marshall McLuhan (1911-1980)

'One man can make a difference and every man should try.'

- Jacqueline Kennedy Onassis (1929-1994)

'May your future be limited only by your dreams.'

- Teacher and astronaut Christa McAuliffe (1948-1986)

'Men and nature must work hand in hand. The throwing out of balance of the resources of nature throws out of balance also the lives of men.'

- President Franklin D. Roosevelt (1882–1945)

'I don't know what you can say about a day when you see four beautiful sunsets.'

- Astronaut John Glenn (1921–2016)

'Under God' was added to the pledge in 1954 as an anti-communist statement

When President Eisenhower signed the phrase into law on Flag Day 1954, the intent was ideological: to distinguish American democracy from "godless" Soviet communism. The author of the original 1892 pledge, Francis Bellamy, was himself a Baptist minister who believed in the separation of church and state, making the addition an inversion of his intent.

Einstein warned the president that splitting atoms could lead to powerful bombs

In a 1939 letter to Franklin D. Roosevelt, Albert Einstein explained that nuclear fission could produce immense energy—and devastating weapons. The warning helped spur the Manhattan Project, a role Einstein later deeply regretted.

'Keep working on a plan. Make no little plans. Make the biggest one you can think of, and spend the rest of your life carrying it out.'

- President Harry Truman (1884-1972)

John Glenn's Friendship 7 flight finally put the US in orbit in February 1962

After the Soviets took the lead in the space race, John Glenn's three-orbit Friendship 7 mission on February 20, 1962, made him the first American to orbit Earth. This NASA anniversary piece delivers a minute-by-minute account—from launch delays to splashdown and recovery.

Hear Carl Sagan reflect on the smallness of humanity

'The arts and sciences are avatars of human creativity. It's our attempt to influence things, the universe internal to ourselves and external to us.'

- Mae Jemison (1956-present), the first Black woman in space

'Hearts are the strongest when they beat in response to noble ideals.'

- American diplomat Ralph Bunche (1904–1971)

Watch the historic treaty signing that established NATO in 1949

NATO was created with the signing of the North Atlantic Treaty on April 4, 1949, in Washington, DC. The clip embedded in the webpage includes a newsreel with an excerpt from US President Harry Truman’s speech celebrating the historic day.

'Service to others is the rent you pay for your room here on earth.'

- Muhammad Ali (1942-2016)

'Too often we participate in the globalization of indifference. May we strive instead to live global solidarity.'

- Pope Francis (1936 - 2025)

The history of ARPANET and how it helped the US military during the Cold War

President Dwight D. Eisenhower established the Advanced Research Projects Agency in 1958, which recruited scientists to design the first large-scale computer network to support the American military during the Cold War. Academics would use the network to communicate via email among several US research universities.

The origins of Neil Armstrong's moon landing quote is still debated

When Neil Armstrong stepped onto the moon on July 20, 1969, his first words, transmitted across the globe, became legendary. Decades later, historians still debate whether he meant to say "one small step for a man," and where the phrasing may have originated.

Read an excerpt from the Monroe Doctrine, introduced in Monroe's 1823 address to Congress

On Dec. 2, 1823, President Monroe delivered his seventh annual message to Congress, now known as the State of the Union. One segment—warning European powers against interfering in the Western Hemisphere—became known as the Monroe Doctrine.

'We are on the move now ... Like an idea whose time has come, not even the marching of mighty armies can halt us. We are moving to the land of freedom ...'

- Martin Luther King Jr. at the conclusion of the five-day, 54-mile march

Voyager mission's Golden Record captures Earth’s essence for alien discovery

Housed aboard Voyager 1 and 2, each record serves as a time capsule of human culture and a peaceful introduction to any intelligent life. Even if never played, the records can outlast humanity and travel through space for a billion years.

Watch Bill Nye be awarded the Presidential Medal of Freedom

President Joe Biden bestowed the honor for Nye's work in science education, science advocacy and environmental stewardship, with the White House adding, "By sharing the magic of fun and science, he inspires generations of Americans to follow facts and reason and leave the world better than we found it."

'Early to bed, early to rise, work like hell, and advertise.'

- Ted Turner, on his secret to success (1938-2026)

Meet Yuri Gagarin, the first man in space

In addition to being the first human in space, Yuri Gagarin was a charismatic propaganda icon and a diplomatic headache for the West. This article examines why his image—and legacy—endured long after he died in 1968.

1928: A quote from Amelia Earhart

"Ours is the commencement of a flying age, and I am happy to have popped into existence at a period so interesting."

The 1969 moon landing was a defining Cold War victory for the US

When Apollo 11 astronauts stepped onto the moon in July 1969, it marked a dramatic win in the US-Soviet space race. The televised landing—broadcast across the globe—showcased American technological supremacy.

NASA designed the Golden Record using hydrogen to ensure it's universally readable

The Golden Record holds what is essentially a human "time capsule," featuring music, nature sounds, and greetings from around the world. NASA used the radiation period of hydrogen's simplest transition as a baseline to convey timing and structure. The first coded image is included on the cover as a test so aliens can check if they decoded it correctly.

Lewis and Clark’s journey became a blueprint for future exploration

Combining science, diplomacy, and logistics, the Corps of Discovery created a model for later expeditions—from charting the Arctic to NASA’s space missions.

Internet sleuths solve secret message on Perseverance rover’s Mars parachute

In 2020, the Perseverance Rover landed on Mars, sending a message for the folks back home on its parachute. It took fewer than six hours for the Internet's collective forces to decode the secret slogan hidden in the parachute's colors and patterns, as well as the geographic coordinates of the earth-bound place where rocketry was perfected.

Take a multimedia journey through the thirteen days that nearly ended the world

In October 1962, the Cuban Missile Crisis brought the US and Soviet Union to the brink of nuclear war. This interactive archive from the JFK Library reconstructs those tense days through documents, photos, and secretly recorded conversations from the Kennedy White House.

'Knowledge will forever govern ignorance.'

- US President James Madison (1751-1836)

A quote by scientist Nikola Tesla

"The scientific man does not aim at an immediate result ... His duty is to lay the foundation for those who are to come, and point the way."

A quote by award-winning actor Tom Hanks

"We are still in the position of waking up and having a choice. Do I make the world better today somehow, or do I not bother?"

Television transformed the State of the Union, beginning with Harry Truman

In 1947, President Truman delivered the first televised State of the Union address, marking the address's shift into the visual age and expanding the president's reach beyond radio to a national TV audience.

President Reagan postponed the State of the Union after Challenger

In his Oval Office address delivered the night of the disaster, President Ronald Reagan spoke directly to the nation about the loss of Challenger and its crew, postponing that evening's scheduled State of the Union to address the tragedy.

Read an email Steve Jobs wrote himself in 2010

Steve Jobs apparently liked to email himself to save his thoughts. This archival email, written the year before he died, shows Jobs expressing gratitude and wonder for the world and its creative people.

The Kennan Telegram shaped early US Cold War strategy

In 1946, diplomat George Kennan sent a long telegram from Moscow warning that the Soviet Union was inherently expansionist. His analysis laid the groundwork for the US policy of containment that defined the early Cold War.

How Stalin, Roosevelt, and Churchill shaped the postwar world

The Yalta Conference was a pivotal 1945 meeting between Allied leaders that helped shape the postwar global order and laid the groundwork for the founding of the United Nations.

'Pioneering is never done in front of cheerleaders urging on a roaring grandstand of popular approval.'

- "Star Trek" actor George Takei (1937-present)

See a collection of LIFE's most iconic photos in history

Famous images, like a sailor kissing a nurse in Times Square to celebrate the end of World War II, are each shared with context in this article. See some of history's most famous moments from a unique point of view, including photos of Marilyn Monroe, the Beatles, and Muhammad Ali.

Voyager 1 captured Earth as a 'Pale Blue Dot' from 6 billion kilometers away

On Feb. 14, 1990, NASA's Voyager 1 space probe took the farthest photo of Earth ever captured. Earth appears so small in the image that it takes up less than a single pixel out of 640,000 in the photo's frame.

1978: Thurgood Marshall, commencement address at the University of Virginia

"Where you see wrong or inequality or injustice, speak out, because this is your country. This is your democracy. Make it. Protect it. Pass it on."

'Mr. Watson, come here. I want to see you.'

- Alexander Graham Bell's first words transmitted via telephone (March 10, 1876)

'Happiness depends more upon the internal frame of a persons own mind—than on the externals in the world.'

- George Washington (1732-1799)

A look at the foods eaten by astronauts during and after the space race

After John Glenn became the first American to demonstrate that eating in space was possible by eating apple puree out of a tube, meals were prepared for astronauts to meet an approximately 2,800-calorie-a-day requirement via freeze-dried foods. Meal quality gradually improved throughout the Apollo program, including the Apollo 8 crew's nondehydrated Christmas meal in 1968.

Read Swami Vivekananda's 1893 speech to the World's Parliament of Religions

The Hindu monk’s appearance at the conference, which many credit with introducing the US to Hindusim, emphasized tolerance and bemoaned religious violence and bigotry. “I fervently hope that the bell that tolled this morning in honor of this convention may be the death-knell of all fanaticism,” he told those assembled.

President Barack Obama compared Grace Hopper to the Wright Brothers

When posthumously awarding Hopper with the Presidential Medal of Freedom—the nation's highest civilian honor—on Nov. 22, 2016, the former president remarked, "If Wright is flight, and Edison is light, then Hopper is code. [...] From cell phones to [US] Cyber Command, we can thank Grace Hopper for opening programming to millions more people."