Enlarge (credit: FT Montage/Bloomberg)

Sam Altman’s cryptocurrency project, the Worldcoin Foundation, is rolling out its services globally even as the company cofounded by the OpenAI chief faces regulatory pushback in the US.

The Berlin and San Francisco-based start-up announced on Monday that its technology, including its Worldcoin token—a cryptocurrency traceable on the blockchain that requires users to first prove their identity—will be available in 35 cities across 20 countries.

Central to the effort is an eye-scanning physical “orb,” which Worldcoin’s founders say is necessary for a future in which distinguishing between humans and robots becomes increasingly challenging due to a surge in artificial intelligence technology. Once users have proved they are not robots, they can be issued one of the company’s tokens.

Enlarge (credit: FT Montage/Bloomberg)

Sam Altman’s cryptocurrency project, the Worldcoin Foundation, is rolling out its services globally even as the company cofounded by the OpenAI chief faces regulatory pushback in the US.

The Berlin and San Francisco-based start-up announced on Monday that its technology, including its Worldcoin token—a cryptocurrency traceable on the blockchain that requires users to first prove their identity—will be available in 35 cities across 20 countries.

Central to the effort is an eye-scanning physical “orb,” which Worldcoin’s founders say is necessary for a future in which distinguishing between humans and robots becomes increasingly challenging due to a surge in artificial intelligence technology. Once users have proved they are not robots, they can be issued one of the company’s tokens.

Enlarge (credit: FT Montage/Bloomberg)

Sam Altman’s cryptocurrency project, the Worldcoin Foundation, is rolling out its services globally even as the company cofounded by the OpenAI chief faces regulatory pushback in the US.

The Berlin and San Francisco-based start-up announced on Monday that its technology, including its Worldcoin token—a cryptocurrency traceable on the blockchain that requires users to first prove their identity—will be available in 35 cities across 20 countries.

Central to the effort is an eye-scanning physical “orb,” which Worldcoin’s founders say is necessary for a future in which distinguishing between humans and robots becomes increasingly challenging due to a surge in artificial intelligence technology. Once users have proved they are not robots, they can be issued one of the company’s tokens.

Enlarge / A Z16 Mainframe.

Mainframe computers are often seen as ancient machines—practically dinosaurs. But mainframes, which are purpose-built to process enormous amounts of data, are still extremely relevant today. If they’re dinosaurs, they’re T-Rexes, and desktops and server computers are puny mammals to be trodden underfoot.

It’s estimated that there are 10,000 mainframes in use today. They’re used almost exclusively by the largest companies in the world, including two-thirds of Fortune 500 companies, 45 of the world’s top 50 banks, eight of the top 10 insurers, seven of the top 10 global retailers, and eight of the top 10 telecommunications companies. And most of those mainframes come from IBM.

In this explainer, we’ll look at the IBM mainframe computer—what it is, how it works, and why it’s still going strong after over 50 years.

Enlarge / A Z16 Mainframe.

Mainframe computers are often seen as ancient machines—practically dinosaurs. But mainframes, which are purpose-built to process enormous amounts of data, are still extremely relevant today. If they’re dinosaurs, they’re T-Rexes, and desktops and server computers are puny mammals to be trodden underfoot.

It’s estimated that there are 10,000 mainframes in use today. They’re used almost exclusively by the largest companies in the world, including two-thirds of Fortune 500 companies, 45 of the world’s top 50 banks, eight of the top 10 insurers, seven of the top 10 global retailers, and eight of the top 10 telecommunications companies. And most of those mainframes come from IBM.

In this explainer, we’ll look at the IBM mainframe computer—what it is, how it works, and why it’s still going strong after over 50 years.

Enlarge / A Z16 Mainframe.

Mainframe computers are often seen as ancient machines—practically dinosaurs. But mainframes, which are purpose-built to process enormous amounts of data, are still extremely relevant today. If they’re dinosaurs, they’re T-Rexes, and desktops and server computers are puny mammals to be trodden underfoot.

It’s estimated that there are 10,000 mainframes in use today. They’re used almost exclusively by the largest companies in the world, including two-thirds of Fortune 500 companies, 45 of the world’s top 50 banks, eight of the top 10 insurers, seven of the top 10 global retailers, and eight of the top 10 telecommunications companies. And most of those mainframes come from IBM.

In this explainer, we’ll look at the IBM mainframe computer—what it is, how it works, and why it’s still going strong after over 50 years.

A giant Pacific octopus shows its colors at the Monterey Bay Aquarium. (credit: Monterey Bay Aquarium)

While other octopus books study the animal's behavior in aquaria or tropical waters worldwide, Dr. David Scheel, a professor of Marine Biology at Alaska Pacific University, takes a unique approach in his first book , Many Things Under a Rock. He travels to extreme places in the Pacific Northwest where one may not expect these creatures to live, but they have for approximately 330 million years

“I think it is a little surprising to some people that octopuses live in cold water,” Scheel told Ars. “It might be because we're used to seeing them in aquariums, and we think of aquariums as tropical locations, although you can run cold water aquariums as well.”

Personal experience

In Many Things Under a Rock, Scheel regales the reader with anecdotes of his time researching cephalopods in Alaska and Canada. From yearly tracking of octopus dens to discovering new octopus “cities,” Scheel’s chapters give engaging and informative stories on marine biology. Between these chapters are Indigenous stories about octopuses in the Pacific Northwest, revealing their influence on the area's native tribes.

A giant Pacific octopus shows its colors at the Monterey Bay Aquarium. (credit: Monterey Bay Aquarium)

While other octopus books study the animal's behavior in aquaria or tropical waters worldwide, Dr. David Scheel, a professor of Marine Biology at Alaska Pacific University, takes a unique approach in his first book , Many Things Under a Rock. He travels to extreme places in the Pacific Northwest where one may not expect these creatures to live, but they have for approximately 330 million years

“I think it is a little surprising to some people that octopuses live in cold water,” Scheel told Ars. “It might be because we're used to seeing them in aquariums, and we think of aquariums as tropical locations, although you can run cold water aquariums as well.”

Personal experience

In Many Things Under a Rock, Scheel regales the reader with anecdotes of his time researching cephalopods in Alaska and Canada. From yearly tracking of octopus dens to discovering new octopus “cities,” Scheel’s chapters give engaging and informative stories on marine biology. Between these chapters are Indigenous stories about octopuses in the Pacific Northwest, revealing their influence on the area's native tribes.

A giant Pacific octopus shows its colors at the Monterey Bay Aquarium. (credit: Monterey Bay Aquarium)

While other octopus books study the animal's behavior in aquaria or tropical waters worldwide, Dr. David Scheel, a professor of Marine Biology at Alaska Pacific University, takes a unique approach in his first book , Many Things Under a Rock. He travels to extreme places in the Pacific Northwest where one may not expect these creatures to live, but they have for approximately 330 million years

“I think it is a little surprising to some people that octopuses live in cold water,” Scheel told Ars. “It might be because we're used to seeing them in aquariums, and we think of aquariums as tropical locations, although you can run cold water aquariums as well.”

Personal experience

In Many Things Under a Rock, Scheel regales the reader with anecdotes of his time researching cephalopods in Alaska and Canada. From yearly tracking of octopus dens to discovering new octopus “cities,” Scheel’s chapters give engaging and informative stories on marine biology. Between these chapters are Indigenous stories about octopuses in the Pacific Northwest, revealing their influence on the area's native tribes.