What is a reply all email storm?

Memes can be traced back to the chain letter

Such intentional reshaping of communication transmissions dates back at least hundreds of years to the advent of the chain letter, a type of message that asks readers to create their own copy or at least forward it to others.

The Melissa 'virus' helped associate pornographic sites with computer viruses

A worm-embedded document posted online enticed users to download and open it by alleging to contain passwords to paywalled explicit websites. Upon opening, the worm shared itself with 50 addresses in a user's Outlook contacts, masquerading as a friendly attachment. Its rapid spread overwhelmed email servers and caused $1.1B in damage worldwide.

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

Could the world's largest solar storm happen again?

In 1859, the world witnessed the most intense solar storm in recorded history. The electromagnetic deluge of dust and gas lit up the night sky and sparked fires, disrupting Earth's magnetic field and putting on a show for the millions. If a storm with a similar intensity today occurred, scientists believe it would be catastrophic for our communications systems. Learn what would happen if the Carrington Event happened again here.

The origin of chaos theory, colloquially known as the 'butterfly effect'

The theory explains that systems following well-understood physical laws can still produce unpredictable outcomes due to small variations in their initial conditions. Originally identified in weather data, elements of chaos have been observed in stock market fluctuations, cardiac arrhythmias, and the evolution of online social movements.

A 2019 meme about Area 51 led to arrests and a music festival

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," spawning countless memes. Millions marked themselves as "going," and seven were arrested at a gate into the area. It also inspired a music festival attended by more than 7,000 people.

20 of the most common cyberattacks

While there are dozens of different types of cyber attacks, this article explains the top 20 most common network attack examples, including phishing, whale-phishing, and spear-phishing attacks. Learn how to best protect yourself.

How brain cells carry information

At any moment, there is an electrical storm coursing through your body. Discover how chemical reactions create an electric current that drives our responses to everything from hot pans to a mother’s caress.

What is a heat dome?

The world is seeing regular heat waves with multiple causes, including so-called "heat domes," a term rising in use in recent years. A heat dome occurs when the atmosphere traps hot ocean air like a lid or cap, creating stifling conditions and resulting in extended periods of heat. See an illustration of this phenomenon and read how it works with this brief explainer.

Learn all about different types of extreme weather

Find out in more detail about different types of extreme weather, from flooding to thunderstorms, from tropical cyclones to sandstorms, and more (w/ helpful videos).

See the average daily volume of data processed by the internet, from emails to Zoom meetings

During February 2025, over 333 billion messages were sent via email every day, or approximately 231,400,000 per minute. Over 150 million hours were spent daily on Zoom meetings worldwide, but almost 10 times that amount of video content was streamed in the same timeframe.

An image of a shark swimming on the freeway repeatedly fools viewers during natural disasters

The long-running joke traces back to 2011, following Hurricane Irene in Puerto Rico. Since then, pranksters have spread the image after Hurricane Matthew in 2016, Hurricane Harvey in 2017, and Hurricane Laura in 2020. The image is photo-edited, combining a 2005 photo of a kayaker being followed by a great white shark and a photo of a flooded street.

How the people behind spam text messages make money

If you've ever gotten a text message from a scammer—sometimes even just someone from an unknown number saying hello and calling you by the wrong name—you've probably wondered what they're trying to get out of you. This podcast answers that question. Hint: The answer has to do with cryptocurrency.

Time magazine ran a cover story titled 'The End of the World as We Know it?' in January 1999

In January 1999, Time published a dramatic Y2K cover with apocalyptic imagery and dire headlines. The portrayal likely exacerbated public fear and magnified the crisis in the popular imagination, turning a technical issue into a cultural panic.

The origin of the term STEM—science, technology, engineering, and mathematics—at the NSF

In 2001, Judith Ramaley coined the acronym while director of the National Science Foundation to replace "SMET," which was considered awkward-sounding. Since then, additional elements have been incorporated in various settings to modify the acronym, such as STEAM-based education, which includes art.

Chaos theory—informally known as the butterfly effect—is the reason why weather forecasts are presented with probabilities rather than certainties.

Dirty lightning is a thunderstorm created from friction between rising and falling flows of ash and smoke during volcanic eruptions.

Explore scandals that got the "‑gate" treatment

Since the 1972 break-in at Washington's Watergate complex, the "-gate" suffix has become a global shorthand for scandal—ranging from major political crises to minor controversies—revealing how Watergate reshaped public discourse about misconduct and cover-ups.

Are you a digital hoarder? There are four types, actually

Digital hoarding: the phenomenon where people accumulate excessive digital clutter, like thousands of emails, hundreds of open browser tabs, and unused apps on their devices. This behavior has been associated with increased stress levels and potential negative impacts on mental well-being. Are you a digital hoarder? Find out the four types here.

Deep Impact was the first mission to probe beneath a comet's surface

The NASA mission sent a probe to deliberately crash into comet Tempel 1, producing an explosion equivalent to 4.7 tons of TNT. The payload included a compact disk with more than 625,000 names of people who participated in the "Send Your Name to a Comet!" campaign.

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.

Explore what 20,000 letters to an advice columnist tell us about US anxieties and concerns.

This interactive story breaks down common themes—and specific questions—that were posed to Dear Abby, America's longest-running advice column.

Norman Rockwell's 'Freedom of Speech' has become an internet meme

The famous painting, which portrays a man in work clothes speaking up in a crowd of men in suits, has become a companion image for internet users posting unpopular or controversial opinions. (Some users may experience a paywall.)

How to prevent a worst-case scenario with synbio

Author and entrepreneur Rob Reid reviews the risks of a world where more and more people have access to the technology needed to create a doomsday bug that could wipe out humanity.

Multiple sclerosis means 'many scars'

That's a reference to the scarring or lesions that occur in the brain, spinal cord, and elsewhere whenever the immune system has a flare-up. The immune system attacks the myelin because it incorrectly responds as if it's a threat, damaging the body's ability to transmit electrical signals effectively from areas of the body to the brain.

Taylor Swift fans are called 'Swifties'

Taylor Swift has a massive worldwide fanbase. Interacting with fellow so-called “Swifties” is part of what keeps her fans engaged. An interview with a 21-year-old fan who runs an influential Taylor fan account on X (formerly Twitter) talks about what it’s like to connect with fellow fans and their experiences.

The second phase of acute stress: the 'slow' response

The body's reaction to acute stress involves two responses: fast and slow. The first occurs immediately, with the central nervous system triggering the release of adrenaline. The second releases cortisol, which elevates blood sugar and blood pressure and restricts nonessential functions like digestion and the immune system.

Nuclear weapons release energy through rapid atomic reactions

Nuclear weapons work by unleashing energy from atomic fission—or fusion—reactions. In fission bombs, a critical mass triggers a runaway chain reaction in milliseconds. This video explains the basic science behind their immense explosive power.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

Elk Cloner, the first computer virus to spread in public, was written as a practical joke by Richard Skrenta, a Pittsburgh high school student.

See 33 images that became central to huge scandals, including a young Charles and Camilla, Michael Jackson's baby on a hotel balcony, and Hugh Grant's mugshot.

Discover the catastrophic consequences of a failure of the US electrical grid—something that is more likely than many Americans think.

This site reaches millions of visitors who are tired of AI chatbots and seeking human connection. Pretend to be an AI chatbot and ask questions, provide answers, and draw for people in real time.

In 1984, Operation Smash Hit intentionally crashed a 239-ton train into a nuclear waste canister at 100 miles per hour to prove the canister's safety, which remained completely intact and lost just 0.29 of its 100 pounds of pressure.

Shooting stars, or meteors, are fragments of asteroids and comets that burn up as they enter Earth's atmosphere, creating streaks in the sky called meteor showers.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

Coral polyps reproduce via broadcast spawning, where entire reefs simultaneously release reproductive cells for about one hour, once a year.

Fireworks-related ER visits are on the rise—in 2024, they increased by 52% as compared to the prior year.

During the French Revolution, a botanist's letter asking about "dear Rhus" (poison ivy) was intercepted, leading authorities to suspect he was conspiring with the Russians.

The use of fungi to detoxify land and water—a process known as mycoremediation—has been used to clean up natural resources affected by the 2025 California wildfires.

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.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

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

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

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.'

This real-time tracking of the hantavirus cruise ship outbreak in May 2026 offers a unique glimpse into the global reach of the outbreak and whether the virus sickened passengers and their communities around the world.

Existentialist writer Jean-Paul Sartre coined the famous phrase 'Hell is—other people' in his play 'No Exit'

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

An initial public offering or 'IPO' is the process of a private company becoming public by putting shares of the company on the stock market for purchase.

Explore a list of the 100 best novels of all time, compiled by some of the world's best living writers, including Salman Rushdie, Stephen King, and Jennifer Egan.