The death of his wife may have inspired Samuel Morse to invent the telegraph, which uses an electromagnet to quickly send messages over long distances.

An 1844 chess match via telegraph anticipated the board game's online popularity.

Twain claimed to possess 'mental telegraphy'

In an 1891 essay, the writer claimed to possess psychic powers. It’s something that seemingly supported by his mother and his own death: Twain predicted he would die the day after Halley’s Comet returned in 1910, which did indeed happen.

Why millions of telegrams are still sent every year

Telegrams enabled much faster communication across distances when they were invented in the 1800s, but they became generally obsolete after emails and cell phones were widely adopted. So why are 17 million still sent every year? A combination of factors: the legal requirement to send paper documents far and fast, the resistance to updating processes, and nostalgia. Explore more with this video.

Thomas Edison, eager to communicate with ghosts, tinkered with an apparatus called the 'spirit phone.'

The disputed inventor of the radio

Guglielmo Marconi was awarded the 1909 Nobel Prize in physics for inventing the wireless telegraph, which used radio waves to transmit Morse code. Nikola Tesla, however, was experimenting with radio waves in the 1890s, though much of his work was destroyed in a 1895 fire.

The long-lost art of coded postage stamps

In the 1800s, the postcard was a relatively new phenomenon, as was the post office. In the burgeoning system, recipients of mail had to sometimes pay prohibitively costly fees to receive it. So to get around the fees, a system of placing stamps on the envelopes in specific ways to communicate—a simple yes or no—was devised by clever mailers and expanded and codified by postcard companies into guides. Learn about the fascinating system here.

19th-century Americans used technology to try to prove the existence of ghosts

In the 19th century, following technological advancements like the telegraph, phonograph, and others, efforts were made to capture proof of ghosts. These technologies seemed supernatural in their own right and emerged at the same time Spiritualism took off in the US, resulting in new approaches to connecting with the dead.

James Garfield's 79-day decline hooked America on news updates

After he was shot while departing Washington, DC, in 1881, the president was treated for his wounds and cared for at the White House. Since 1861, telegraphs had spanned the continent, and the Associated Press pooled sources to share telegraph news. The public, seeking updates on the president's condition, was able to receive them regularly for the first time due to this network, laying the foundation for the continuous news cycle.

Guglielmo Marconi overshadowed Nikola Tesla through commercialization

Despite Tesla envisioning wireless power and communication earlier, Marconi developed practical implementations of wireless communication, including transmitting the first transatlantic radio signal. The technology, which facilitated telegraphy critical for warships and navies, earned Marconi the 1909 Nobel Prize in physics.

Watch a timeline of the history of electricity, from observations of static electricity in antiquity to the War of the Currents—a rivalry to establish the ideal system for electric grids.

The Civil War introduced many technological advances to both society and warfare.

Thomas Edison publicly executed animals with AC to convince the public of its dangers

J.P. Morgan first backed Thomas Edison's direct current system, seeing electricity's potential to usurp John D. Rockefeller's kerosene empire. Despite the investments and smear campaign against alternating current, alternating current ultimately won public support after lighting the 1893 World's Fair, after which Morgan would fund Tesla's wireless transmission tower.

Pierre Curie's knowledge of electromagnetism helped decipher radioactivity

Alongside his brother, he studied electric fields in crystals and the magnetic properties of substances, which required the construction of delicate electrometers. He would use this apparatus with Marie Curie to measure radioactive emissions and the presence of undiscovered radioactive elements.

Breaking down how Dickinson viewed letters as an extension of her poetry

The poet's many correspondences were dashed with playful arrangements of text, offering her pen pals surprises once they opened their envelopes. Jana Dambrogio and Daniel Starza Smith explain how Dickinson even creatively used the 19th-century security technique of letterlocking in poetic ways.

The world's first text message was sent on Dec. 3, 1992, when 22-year-old engineer Neil Papworth sent 'Merry Christmas' from a computer terminal.

Around 380 underwater cables power the Internet across the world.

On July 29, 1858, two steam-powered battleships met in the middle of the Atlantic Ocean. There, they connected two ends of a 4,000 kilometer (2,500 mile) long, 1.5 centimeter (0.6 inch) wide cable, linking for the first time the European and North American continents by telegraph.

The 'Mission: Impossible' theme song's opening notes were inspired by Morse code

The espionage franchise is all about secret codes, including one embedded in its popular theme song. The opening notes are based on Morse code, which translates to "M" and "I."

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.

The first battery was invented to settle a dispute over what caused severed frog legs to twitch when connected to different metals.

The QWERTY layout first appeared in the Sholes and Glidden typewriter, sold starting in 1874 by the E. Remington and Sons gun manufacturer, which was looking to diversify after the Civil War.

The first tattoo gun was based on an electric pen invented by Thomas Edison.

J.P. Morgan provided Nikola Tesla with funding for the Wardenclyffe Tower

The structure was part of a project to transmit electricity and communication signals wirelessly across the globe. Shortly after construction began, Guglielmo Marconi beat Tesla to the punch and transmitted a trans-Atlantic signal, preventing Tesla from getting additional funding to finish his project.

Ray Bradbury said he was inspired to pursue writing after meeting a magician named Mr. Electrico, but scholars have never been able to confirm the story.

Mark Twain had many gripes with the US Postal Service

Twain often complained about the cost of postage and the service's inefficiencies, often sharing these criticisms in newspaper opinion pieces. Still, in 1907, the USPS issued a commemorative stamp featuring his face.

Thomas Jefferson delivered his 1801 State of the Union address in writing

In 1801, President Jefferson ended in-person State of the Union addresses, feeling they were too monarchial, and sent written messages instead—a practice that lasted until 1913. His first message was written and sent via his secretary, Meriwether Lewis, who later led the Lewis and Clark expedition.

Before the invention of transistors, vacuum tubes made radio possible

Discovered by Thomas Edison, vacuum tubes allow electrical currents to travel through empty space. Later modified into a diode—keeping current flowing in only one direction—vacuum tubes allowed electronics to turn alternating current into direct current.

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

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

Thomas Edison captured the only known footage of Mark Twain

The inventor was a pioneer in the early film industry and made his own motion pictures. In 1909, he shot a short film featuring Twain at Stormfield, his property in Connecticut. In it, Twain wears his iconic white suit and drinks tea with his daughters.

A joke about mercury in an elevator led to the invention of emoticons

A false message about mercury contamination was posted in response to a physics problem on Carnegie Mellon's discussion board in 1982, which some users took seriously. The need to indicate which messages were jokes led to the creation of facial expressions using special characters.

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.

Reforms reducing postage rates helped popularize Valentine's Day cards

In 1845, Congress voted to slash postage rates, paving the way for larger swaths of the American public to send and receive mail. This convenience was capitalized on by paper and stationery sellers who sought to profit from the holiday. Esther Howland's New England Valentine Company was the first major commercial producer of valentines in the US, but Hallmark followed a few decades later.

Understanding the relationship between Dickinson and Thomas Wentworth Higginson

One of Dickinson's most significant pen pals was Thomas Wentworth Higginson, a minister, politician, and writer, who became a trusted creative adviser and, after her death, one of the editors of her first published volumes. Their relationship began after Dickinson sent him a letter asking, "Are you too deeply occupied to say if my Verse is alive?"

The evolution of the em dash, a now-controversial piece of punctuation

The curious form of punctuation was originally used to replicate humans' naturally broken—and sometimes scattered—way of speaking, with Shakespeare often using it in his plays and Emily Dickinson deploying it for numerous effects. But as large language models like ChatGPT began using the em dash, real humans began viewing it as a tell of non-human writing. This podcast episode dives into the strange turn of events.

The speed of electricity may refer to the movement of electrons, which is on the order of a fraction of a millimeter per second, or energy, which is near the speed of light.

Electromagnetic induction creates electricity from a changing magnetic field

The phenomenon was discovered in 1831 by Michael Faraday when an electric current was induced in a wire wrapped around an iron ring after a second wrapped wire not connected to the first was connected or disconnected from a battery.

Watch how the Enigma machine encrypts messages and learn about its critical design flaw

Using settings selected from a series of rotors and a plugboard that let operators swap letters with any of their choosing, the machine lit up the output letter for each letter typed. While this system could generate messages requiring any of 150 quintillion potential keys, the machine's reflector never encrypted a letter as itself, providing an entry point for exploiting the system.

In 1898, Nikola Tesla wowed a crowd by controlling a boat with no visible connection

Some onlookers thought it was a trick, such a a monkey being inside the boat, rather than mind control or some other metaphysical phenomenon. In reality, Tesla was pioneering radio waves, proving wireless control was possible.

With a core consisting of a glass fiber roughly the width of human hair, fiber-optic cables transmit digital information via flashes of light that reflect within the glass.

Before transistors, which regulate the flow of electricity, vacuum tubes—glass tubes containing no gas that resemble light bulbs—served as the electronic switches in computers.

Named after Nikola Tesla, who pioneered alternating current power systems, the Tesla coil was the first device to wirelessly transmit electricity.

Nikola Tesla's biggest dream was a worldwide network of wireless power transmission

He built the Wardenclyffe lab and a massive prototype transmission tower to develop trans-Atlantic transmission, but it was never operational. The concept was based on incorrect assumptions about Earth's conductivity, but it inspired subsequent efforts for wireless systems.

Arnold Schoenberg designed a musical typewriter that transcribed complex compositions with a simple keyboard.

Twain was a notoriously bad investor

After becoming a famous writer, Twain invested in railroad stocks, a magnetic telegraph, and a printing press that weighed four tons. Eventually, he founded his own publishing company, which ultimately led to his bankruptcy. “He is, in business,” one lawyer said, “just a big overgrown boy.”

Alternating current was used to commit the first execution by electric chair

Dubbed the "executioner's current," the device was designed in Thomas Edison's lab by Harold Brown—an opponent of George Westinghouse and Nikola Tesla. The effort aimed at discrediting AC technology and gain favor for Thomas Edison's direct current as part of "The Current War."

How the Inca used threads to communicate

One of the great mysteries of ancient Peru is that the Inca did not have a system of writing, but communicated with a system of strings tied with knots. This 4-minute video explores its possible uses.

Dickens' live readings sometimes used visual projectors that predated cinema

Dickens was interested in adapting his work in various forms. With his live readings, he sometimes used a 'magical lantern,' a popular tool that projected moving slides. In addition, some stage plays of Dickens' work that included ghost scenes used the magical lantern to cast apparitions on stage.

How Emily Dickinson poetically deployed the em dash

Dickinson had many purposes for dashes in her poems: Sometimes they serve rhythm, sometimes they reflect the naturally fragmented way we tend to speak, and sometimes they are a simple artistic choice. This quick explainer breaks down how dashes work grammatically and how they operate in some of Dickinson's verses.

Nikola Tesla embraced showmanship when promoting ideas ahead of their time

He once electrified himself during a live demonstration to illustrate the safety and power of alternating current, and his presentations often featured arcing coils, glowing lights, and bold claims about a future of wireless power.

Browse a list of the most important invention from each state

From Alabama's electric hearing aid and Idaho's television to Washington's artificial heart and Wisconsin's space suit, this map highlights technological breakthroughs with outsized impacts from each US commonwealth. The District of Columbia is also featured as the state of origin for the telegraph and Morse code. (Some readers may experience a paywall.)

Emily Dickinson's poems were heavily altered after her death, with editors removing many of the peculiar aspects that readers now identify with her work.