How Stephen Hawking’s voice became iconic

The speech software's origins at MIT led to Hawking's trademark voice being American

Stephen Hawking's trademark voice is called "Perfect Paul," but it mimics Dennis Klatt, an American researcher at MIT who developed the speech synthesis technology. Klatt used his voice during this development, which was immortalized through Hawking.

A blend of brilliance and humor made Stephen Hawking's cameos unforgettable

Throughout his life, he appeared in numerous pop culture moments—from "The Simpsons" to "The Big Bang Theory"—showing his talent for comedy and his love of science outreach. He was the only person to play himself on "Star Trek: The Next Generation," even writing some of his own lines.

Stephen Hawking's condition explained

Diagnosed with ALS at 21 and told he had two years to live, Stephen Hawking went on to change our understanding of black holes and the universe, living 55 more years and defying every expectation.

According to his daughter, Stephen Hawking defied early doubts about his intellect

Lucy Hawking details what it was like to be the daughter of the famed cosmologist and what his life looked like from her eyes. Among the anecdotes was Stephen's enjoyment of being on "The Simpsons" because production gave him a wheelchair with helicopter blades.

Stephen Hawking's early rowing days shaped the bold persona for which he became known

Before gaining fame as a physicist, Hawking was a coxswain at Oxford, where the sport helped him find his social footing and develop leadership skills, even as his motor neuron disease began to emerge.

The journalist who let AI speak with his voice

Journalist Evan Ratliff became the object of his own story: He opted to clone his voice, feed it into an AI chatbot, and have it do the talking. What could seem like a fun experiment ended up revealing just how far the capacity of artificial intelligence can go in imitating our identities. Hear the ins and outs of how Ratliff achieved this in this fun and thought-provoking episode.

Create professional-quality spoken audio from text

Generative AI now makes it possible to create everything from computer-generated written content to beautiful imagery and hyper-realistic videos in seconds from a user’s simple text prompt. Add to that list: High-quality spoken audio, which the AI software company ElevenLabs specializes in. Its natural-sounding speech synthesis and text-to-speech tech can produce human-like speech that mimics a variety of different tones, styles, and accents.

Using AI to restore speech 30 years after a stroke

Through a novel surgical procedure involving electrodes implanted in the brain, along with the help of artificial intelligence, a stroke patient is regaining her ability to speak. This technology converts her thoughts into speech through a digital avatar, allowing her to verbally express herself for the first time in decades.

An expert recreates the voice of a 3,000-year-old mummy

Ear, nose, and throat expert David Howard discusses how his research team extracts vocal folds from preserved human tissue, which allows them to model the deceased person's larynx. From there, they can create a synthetic voice based on the organ's geometry.

One man provides temporary vocals for nearly every character on 'The Simpsons'

Early in the production process, voice actor Chris Edgerly voices hundreds of characters so animators can create preliminary sketches. In this interview, he explains how he learned to mimic the characters' unique voice and tics.

Movie trailers changed after the king of voice-overs died

Don LaFontaine, known in the film industry as "Thunder Throat," provided voice-over for over 5,000 film trailers. After he died in 2008, the trailer formula changed, with most preferring to lean into dialogue from the film.

Explore a deepfake speech of an alternate reality where Apollo 11 failed

As the Apollo 11 astronauts prepared for their journey to the moon, two speeches were drafted for President Richard Nixon: one to be delivered upon the astronauts' success and another to comfort the public in case of failure. This interactive explores the creation of a believable version of the latter.

Professional vocalists explain the mechanics of singing

Ever wonder how your favorite singer hits those high notes? Have you been amazed at someone bringing down the house at karaoke? The secret behind singing is that it's more technical than most realize. In this video, a handful of professional vocalists break down the basics to demonstrate how you can develop a more musical voice.

James Earl Jones didn't become the voice of Darth Vader until after shooting had concluded

The archvillain was originally voiced by David Prowse, who played him on screen. But Prowse's Scottish accent, higher-pitched voice, and muffled delivery (due to the character's mask) made for an underwhelming performance. Jones was brought in during postproduction to do voiceover, recording all the dialogue in under three hours.

In 1939, baseball star Lou Gehrig delivered his inspirational 'Luckiest Man' speech after retiring due to the health condition that now bears his name.

Nintendo developed the character as its technology improved

Nintendo developed the Mario character as video game technology became more sophisticated. In 1991, Charles Martinet began playing Mario at trade shows and then voiced the character for 1996’s “Super Mario 64,” which included the now-classic catchphrase, “It’s a-me, Mario!”

9 billion voice notes are sent every day

The recorded voice note has come to replace a regular phone call conversation for some. Observers suggest the monological nature of the voice note corrodes the benefits of real-life interactions.

Steve Jobs in his final public talk

The last major event outside of Apple that Steve Jobs spoke at, prior to his death in 2011, was the 2010 All Things Digital conference. In spite of his declining health, he is voluble and combative throughout.

How the National Science Foundation helped cement the use of American Sign Language

Before the 1960s, deaf students were taught to read lips and pronounce words without signing, which was not considered a true language. After noticing that students nonetheless signed when communicating, American linguist William Stokoe conducted NSF-funded research that showed that signing met the definition of oral languages, thus establishing ASL.

In 2025, Apple devices couldn't send audio messages with the phrase 'Dave & Buster's'

The transcription engine in iOS 18, which converts speech to text in the Messages app, had been incorrectly processing phrases with the ampersand ("&") symbol. The error was corrected via a bug fix after extensive user error reports.

Dylan was called 'the voice of his generation,' but rejected the title

By the mid-60s, Dylan made it clear he had no desire to be a spokesman for anyone but himself. He found the title stifling and believed it would prevent him from creating authentic art.

Supermassive black holes create pressure waves, detectable as extremely low sounds

Space is largely silent because it lacks a medium for sound waves. Some Mars rovers capture sounds of wind, though the sounds are too low to hear. Through sonification, astronomical data can be translated into hearable sounds for broader engagement.

Tony Hawk often doesn't get recognized in public

Tony Hawk is frequently misrecognized—partly because he's older now and his legal name is Anthony—with strangers often telling him he "looks like Tony Hawk" without realizing he is, in fact, the famed skateboarder.

Performance artist Laurie Anderson had an unexpected pop hit with 'O Superman'

Anderson was a working performance artist in New York through the 1970s and pressed a small run of the song—an idiosyncratic, vocoder-driven piece that sounded unlike anything on pop radio. Thanks to a push from influential British DJ John Peel, the song became an unexpected hit, propelling Anderson (and her art) into the mainstream.

Stand-up Marc Maron invented the modern comedy podcast

In 2009, Marc Maron created his podcast “WTF,” featuring the stand-up holding long, candid conversations with an eclectic selection of guests. That template now defines modern podcasting, including some of the medium’s most popular shows.

How the Guy Fawkes mask became iconic

The Guy Fawkes mask, popularized by the film "V for Vendetta," is now one of the most iconic visual symbols in recent history. Learn about the mask's origin and adoption by protest movements in this brief piece. The movie presents an anonymous,...

After NASA's Voyager 1 captured Earth as a single pixel as it left the solar system in 1990, astronomer Carl Sagan used the image to reflect on humanity's fragility and the responsibility to protect 'the only world we've ever known.'

A vending machine run with Anthropic's AI went out of business after it was convinced to give away items for free and sell a video game console.

English mathematician Ada Lovelace wrote the first computer algorithm a century before computers existed and hypothesized that computing devices would one day be able to compose music—foreseeing the generative AI systems of today.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

Dorothy's famous entrance into Oz in 'The Wizard of Oz' relied on analog tricks, including a body double and sepia-toned paint, as much as it did on technology

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

The animatronic shark from Steven Spielberg's 'Jaws,' the first modern blockbuster, was a complex underwater apparatus called 'Bruce.'

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.

The Mona Lisa's celebrity status and repeated restorations have obscured what made the painting so revolutionary for its time

Fish populations in the Great Barrier Reef have increased after installing waterproof speakers on the ocean floor that played recordings of sounds from healthy coral reefs.

A small portion of The Winstons' 'Amen, Brother,' an obscure '60s gospel record, is the basis for thousands of hip-hop tracks, making it one of the most sampled records ever that's informally known as 'the Amen break.'

About 2,000 US babies are born annually without some portion of their limbs, potentially leading to a lifetime of pricey prosthetics.

Mark Twain spent decades feuding with the US Postal Service, convinced its costs and regulations were bureaucratic overreach.

Double world record holder Hunter Ewen helped conquer his fear of balloons, called globophobia, by training to win Guinness World Record titles for balloon inflation.

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.

How the most famous Ebola book, The Hot Zone, which sold 3.5 million copies and was translated into 30 languages, got aspects of the disease so wrong.

Alzheimer's can lead to brain shrinkage, with an average of around 2% of volume reduction per year

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

Sony set the standard for cylinder-shaped batteries when it repurposed manufacturing equipment used to make rolls of magnetic recording tape.

The power and influence of the American presidency have expanded significantly over time—far beyond what the founders envisioned.

'Silent' fireworks have gained more interest in recent years as a quieter celebratory option.

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

While atoms are normally made of protons, neutrons, and electrons, exotic ones have been built with antimatter—alternate versions of normal matter that live for fractions of a second and are about a billion times as rare.