Sailor tattoos represent naval milestones

Tattoos, explained

Tattoos last because immune cells trap ink beneath the skin—but there's more to the story. This overview looks at how ancient cultures used tattoos for status, spirituality and punishment; how technology like the electric tattoo machine transformed the art form, and where innovations like smart tattoos could take it next.

Mermaid tears are a lasting and hazardous form of ocean plastic pollution

Also known as nurdles, these tiny plastic pellets are extremely difficult to remove once spilled. Their chemical composition, which enhances absorption, causes them to contain higher concentrations of certain toxins than the surrounding environment.

Women in WWII used tattoos to avoid capture

During World War II, Japanese soldiers kidnapped women from Southeast Asian countries and forced them into sexual slavery. But they hesitated to capture married women, a fact that women from the island of Timor exploited, painstakingly poking tattoos onto their bodies that marked them as married women.

A history of belly buttons, from dinosaurs to modern dogs

Could dinosaurs have had belly buttons, just like you and me? Some researchers believe they've found evidence the ancient reptiles had the cute scar, a common feature among placental mammals (but which is also found in many more kinds of animals). Dive into their peculiar findings with this fascinating video.

An archive of some of America's most significant shipwrecks

From The Portland—known as New England's "Titanic"—to the Civil War's USS Monitor, this archive from the National Oceanic and Atmospheric Administration provides overviews of some of the most well-known shipwrecks in US history.

Tattoos remain visible on your skin thanks to immune cells called macrophages

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.

Some people smash Champagne bottles on ships for good luck

Long before Champagne existed, people performed good-luck rituals before setting sail. But since animal sacrifice is generally frowned upon these days, a new tradition developed before a ship’s maiden voyage: smashing a bottle of Champagne against the hull.

Where did the term ‘astronaut’ come from?

Astronaut essentially translates to space sailor, though these sailors may be referred to differently depending on their home country. For example, Russian star sailors are called cosmonauts. Though why American, European, Canadian, and Japanese...

Clemens' pen name 'Mark Twain' is a nautical reference

Samuel Clemens became a steamboat pilot’s apprentice in 1857 while writing a travelogue for a small newspaper, and earned his pilot’s license two years later. During that time, he learned the term “mark twain,” which meant 12 feet, something shipworkers would yell when they were approaching shallow waters. In 1861, he signed a travel letter under the pseudonym “Mark Twain” and used it for the rest of his career.

John Steinbeck often drew a pig with wings next to his signature, a character he affectionately called 'Pigasus.'

Lunar New Year has a rich tradition of visual symbolism

Explore centuries of art related to the holiday—from the dragon robes worn by royalty to the calligraphy symbols thought to bring prosperity and fortune. Ancient artistic practices like woodblock printing, painting, and dance weave together to create the visual language of the Lunar New Year.

Synchronized swimming dates back to Ancient Rome

Known for gruesome gladiatorial contests, ancient Rome's aquatic spectacles may have been even more over-the-top. This article dives into the art of synchronized swimming in ancient Rome. Lakes were dug and amphitheaters flooded to provide space for aquatic reenactments of naval battles and artistic performances. Swimmers playing the role of water nymphs would create elaborate shapes, including ships with billowing sails.

Raymond Pettibon designed Black Flag's iconic logo

Pettibon’s brother, Greg Ginn, was the guitarist for a new band in search of a logo. Pettibon delivered an image that would become one of the defining icons of punk: four black bars, meant to symbolize a waving flag.

How muscles get their names

There are more than 600 muscles that crisscross the human body, and each has a name that's more than a simple label. Muscle names also typically communicate the muscle's size, behavior, length, location, appearance, direction, and attachments to bone. These names usually have Greek or Latin roots, such as in the case of the deltoid muscles, which are named in reference to the Greek letter delta (𐤃).

The Army–Navy rivalry has a long history of mascot heists

For decades, spirited cadets and midshipmen have plotted covert missions to steal each other’s mascots—Army’s mule and Navy’s goat—turning the already fierce football rivalry into a game of elaborate pranks and counter-pranks.

The love lives of pygmy seahorses

Inch-long pygmy seahorses live fascinating lives in the Coral Triangle of Southeast Asia, where the tiny sea creatures thrive. They are one of the few species in the world where the male carries its progeny to term, in this case, after receiving an egg from the female, who keeps busy checking in on her two male mates, one of whom is always pregnant. Dive into the marine romance in this fascinating essay.

Explore the animals that populate the depths of the ocean, from fish and coral in the first few hundred feet, all the way down to the bottom of the Mariana Trench.

Basquiat's crown motif acts as an artistic signature

While tagging graffiti across New York, Basquiat began to appreciate the power of repetition and branding, especially while establishing mystique through his “SAMO” tag. Some art critics argue that his crown motif serves a similar purpose, enabling viewers to recognize his work immediately.

How did Polynesian wayfinders navigate the Pacific Ocean?

Ancient Polynesian navigators used the sun, moon, stars, clouds, currents, and more to sail the seas. People of Southeast Asia began their voyages to the region now known as Polynesia in roughly 1500 BCE. They would settle a vast area of 15 million square miles, including hundreds of islands, moving from islands due to overpopulation or war. Such voyages dwindled in 1300 CE as societies became more rooted.

Medieval elites prized narwhal tusks as mythical “unicorn horns”

During the Middle Ages and the Renaissance, narwhal tusks were believed to be unicorn horns, possessing healing and anti-poisonous properties. Coveted by Europe’s elites, they became royal gifts—with one even presented to Queen Elizabeth I by explorer Martin Frobisher.

A look at historical ciphers, from the Spartan 'scytale' to the Navajo Code Talkers

From the Greek word for "hidden writing," cryptography in Ancient Greece took the form of batons around which a long strip of leather or parchment was wrapped, after which messages were written. Recipients needed a scytale of the correct width to encircle received ribbons and reveal the message. Members of the Navajo Nation created a code that remained unbroken throughout its use in World War II.

View galleries of images taken by the Voyager spacecraft during planetary flybys

The images and videos include close-ups of Uranus, Jupiter's Great Red Spot, Saturn's ring system, and Neptune's Great Dark Spot. The Pale Blue Dot color image of Earth is included as part of the solar system's family portrait.

Symmetric patterns of magnetic stripes seen on either side of mid-ocean ridges

The symmetry provides evidence of seafloor spreading, where new oceanic crust is created at mid-ocean ridges, which pushes older ocean crust away on either side. Matching the pattern to magnetized material in rocks on Earth’s surface provided a timeline of ocean floor recycling.

See the most iconic photos from four decades of LIFE magazine

Meet the 56 signers of the Declaration of Independence—most of whom didn't put pen to paper until August 2, 1776—and see their original signatures.

Grace Hopper described serving in the US Navy as the highest award she received

Despite retiring from the US Naval Reserve in 1966 at 60, as stipulated by Navy regulations, Hopper was repeatedly recalled for her pioneering expertise in computer science. By 1983, three years before her final retirement, she would give lectures about 200 days a year to computer scientists at military bases, college campuses, and businesses on behalf of the Navy.

Octopuses have taste receptors along their tentacles

Octopus suction cups are filled with modified sensory receptors that can bind with a greater variety of materials and transport a wider array of information, such as flavor, from tactile stimuli. These structures allow the animal to search for food as it crawls the ocean floor.

The Satanic Temple has protested the presence of the Ten Commandments at state capitols

After Oklahoma and Arkansas put up Ten Commandments monuments on their state capitol grounds, the Satanic Temple argued that if one religion's symbols are allowed, theirs should be, too. The temple asked for permission to install a bronze statue of the goat-headed figure Baphomet next to them.

Graffiti dates back to at least ancient Pompeii, where citizens scrawled messages to one another on public walls

In 1915, workers recovered a submarine-like vessel from the Chicago River, prompting fears of German espionage

Planarian flatworms are small, aquatic worms with exceptional regenerative capabilities. When cut, the worms can regenerate multiple bodies in a matter of weeks.

Explore fun facts from the USPS, including unique post office buildings, a stamp that traveled past Pluto, and more.

For centuries, Niagara Falls has been a magnet for daredevils seeking to conquer one of nature's most powerful wonders, with its 200-foot drop and water rushing at 32 feet per second with 280 tons of force.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

Some Pokémon have been named after real and fictional organisms, while some real-world species have been named after Pokémon, such as Chilicola charizard and Binburrum zapdos.

Artificial coral reefs have been 3D printed from nontoxic, biodegradable terracotta clay, which coral polyps have used as a foundation for rebuilding marine ecosystems.

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

SpongeBob exemplifies Aristotle's philosophy for living well because he understands that happiness doesn't come from external factors like money, recognition, or power.

After 25 people used virtual reality headsets to practice flying with virtual wings—flapping their arms—their visual cortex responded to the wings almost as if they were real arms, treating them as body parts.

American short story writer Flannery O'Connor raised 40 peacocks, which became potent symbols for her fiction's elegant violence

Lesser-known phobias include turophobia, or the fear of cheese, and nomophobia, the fear of being without your cell phone.

Hotels in Cannes, the glamorous city on the French Riviera, hire hawks to ward off seagulls during the city's famous film festival.

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

Salvador Dalí believed he was his own dead brother, who had died nine months before he was born

In 2025, four executives from large tech companies were given positions in the US Army Reserves—including Palantir Chief Technology Officer Shyam Sankar, which reinforced Palantir's ties with the US military and its role as a leading defense partner.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

Prince's sexually explicit 1984 track 'Darling Nikki' attracted the ire of the Parents Music Resource Center, an advocacy group that inspired the Parental Advisory sticker, even though the song ends with a Christian message.

Stars appear to twinkle because turbulence in the motion of molecules in Earth's atmosphere causes light to bend and wiggle rapidly on its way to the surface—a phenomenon called scintillation.