Samsung announced the Galaxy S25, S25+ , and S25 Ultra at its Unpacked event today. What is different from last year's models ? With the phones themselves, not much, other than a new chipset and a wide camera. But pure AI optimism? Samsung managed to pack a whole lot more of that into its launch event and promotional materials.

The corners on the S25 Ultra are a bit more rounded, the edges are flatter, and the bezels seem to be slightly thinner. The S25 and S25+ models have the same screen size as the S24 models, at 6.2 and 6.7 inches, respectively, while the Ultra notches up slightly from 6.8 to 6.9 inches.

Samsung's S25 Ultra, in titanium builds colored silver blue, black, gray, and white silver. Credit: Samsung

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Samsung announced the Galaxy S25, S25+ , and S25 Ultra at its Unpacked event today. What is different from last year's models ? With the phones themselves, not much, other than a new chipset and a wide camera. But pure AI optimism? Samsung managed to pack a whole lot more of that into its launch event and promotional materials.

The corners on the S25 Ultra are a bit more rounded, the edges are flatter, and the bezels seem to be slightly thinner. The S25 and S25+ models have the same screen size as the S24 models, at 6.2 and 6.7 inches, respectively, while the Ultra notches up slightly from 6.8 to 6.9 inches.

Samsung's S25 Ultra, in titanium builds colored silver blue, black, gray, and white silver. Credit: Samsung

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Samsung announced the Galaxy S25, S25+ , and S25 Ultra at its Unpacked event today. What is different from last year's models ? With the phones themselves, not much, other than a new chipset and a wide camera. But pure AI optimism? Samsung managed to pack a whole lot more of that into its launch event and promotional materials.

The corners on the S25 Ultra are a bit more rounded, the edges are flatter, and the bezels seem to be slightly thinner. The S25 and S25+ models have the same screen size as the S24 models, at 6.2 and 6.7 inches, respectively, while the Ultra notches up slightly from 6.8 to 6.9 inches.

Samsung's S25 Ultra, in titanium builds colored silver blue, black, gray, and white silver. Credit: Samsung

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Fast radio bursts (FRBs) are puzzling phenomena because their details are so difficult to resolve, and observations to date have been inconsistent. Astronomers added another piece to the puzzle with the detection of an FRB that seems to originate in a dead galaxy that is no longer producing new stars, according to a new paper published in The Astrophysical Journal Letters, along with a related paper on the event from scientists at Northwestern University.

As we've reported previously , FRBs involve a sudden blast of radio-frequency radiation that lasts just a few microseconds. Astronomers have observed over a thousand of them to date; some come from sources that repeatedly emit FRBs, while others seem to burst once and go silent. You can produce this sort of sudden surge of energy by destroying something. But the existence of repeating sources suggests that at least some of them are produced by an object that survives the event. That has led to a focus on compact objects, like neutron stars and black holes—especially a class of neutron stars called magnetars—as likely sources. Only about 3 percent of FRBs are of the repeating variety.

There have also been many detected FRBs that don't seem to repeat at all, suggesting that the conditions that produce them may destroy their source. That's consistent with a blitzar —a bizarre astronomical event caused by the sudden collapse of an overly massive neutron star. The event is driven by an earlier merger of two neutron stars; this creates an unstable intermediate neutron star, which is kept from collapsing immediately by its rapid spin.

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Fast radio bursts (FRBs) are puzzling phenomena because their details are so difficult to resolve, and observations to date have been inconsistent. Astronomers added another piece to the puzzle with the detection of an FRB that seems to originate in a dead galaxy that is no longer producing new stars, according to a new paper published in The Astrophysical Journal Letters, along with a related paper on the event from scientists at Northwestern University.

As we've reported previously , FRBs involve a sudden blast of radio-frequency radiation that lasts just a few microseconds. Astronomers have observed over a thousand of them to date; some come from sources that repeatedly emit FRBs, while others seem to burst once and go silent. You can produce this sort of sudden surge of energy by destroying something. But the existence of repeating sources suggests that at least some of them are produced by an object that survives the event. That has led to a focus on compact objects, like neutron stars and black holes—especially a class of neutron stars called magnetars—as likely sources. Only about 3 percent of FRBs are of the repeating variety.

There have also been many detected FRBs that don't seem to repeat at all, suggesting that the conditions that produce them may destroy their source. That's consistent with a blitzar —a bizarre astronomical event caused by the sudden collapse of an overly massive neutron star. The event is driven by an earlier merger of two neutron stars; this creates an unstable intermediate neutron star, which is kept from collapsing immediately by its rapid spin.

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Fast radio bursts (FRBs) are puzzling phenomena because their details are so difficult to resolve, and observations to date have been inconsistent. Astronomers added another piece to the puzzle with the detection of an FRB that seems to originate in a dead galaxy that is no longer producing new stars, according to a new paper published in The Astrophysical Journal Letters, along with a related paper on the event from scientists at Northwestern University.

As we've reported previously , FRBs involve a sudden blast of radio-frequency radiation that lasts just a few microseconds. Astronomers have observed over a thousand of them to date; some come from sources that repeatedly emit FRBs, while others seem to burst once and go silent. You can produce this sort of sudden surge of energy by destroying something. But the existence of repeating sources suggests that at least some of them are produced by an object that survives the event. That has led to a focus on compact objects, like neutron stars and black holes—especially a class of neutron stars called magnetars—as likely sources. Only about 3 percent of FRBs are of the repeating variety.

There have also been many detected FRBs that don't seem to repeat at all, suggesting that the conditions that produce them may destroy their source. That's consistent with a blitzar —a bizarre astronomical event caused by the sudden collapse of an overly massive neutron star. The event is driven by an earlier merger of two neutron stars; this creates an unstable intermediate neutron star, which is kept from collapsing immediately by its rapid spin.

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On Tuesday, OpenAI, SoftBank, Oracle, and MGX announced plans to form Stargate, a new company that will invest $500 billion in AI computing infrastructure across the United States over four years. The announcement came during a White House meeting with President Donald Trump, who called it the "largest AI infrastructure project in history."

The goal is to kickstart building more datacenters to expand computing capacity for current and future AI projects, including OpenAI's goal of "AGI," which the company defines as a highly autonomous AI system that "outperforms humans at most economically valuable work."

"This infrastructure will secure American leadership in AI, create hundreds of thousands of American jobs, and generate massive economic benefit for the entire world," wrote OpenAI in a press statement. "This project will not only support the re-industrialization of the United States but also provide a strategic capability to protect the national security of America and its allies."

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On Tuesday, OpenAI, SoftBank, Oracle, and MGX announced plans to form Stargate, a new company that will invest $500 billion in AI computing infrastructure across the United States over four years. The announcement came during a White House meeting with President Donald Trump, who called it the "largest AI infrastructure project in history."

The goal is to kickstart building more datacenters to expand computing capacity for current and future AI projects, including OpenAI's goal of "AGI," which the company defines as a highly autonomous AI system that "outperforms humans at most economically valuable work."

"This infrastructure will secure American leadership in AI, create hundreds of thousands of American jobs, and generate massive economic benefit for the entire world," wrote OpenAI in a press statement. "This project will not only support the re-industrialization of the United States but also provide a strategic capability to protect the national security of America and its allies."

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On Tuesday, OpenAI, SoftBank, Oracle, and MGX announced plans to form Stargate, a new company that will invest $500 billion in AI computing infrastructure across the United States over four years. The announcement came during a White House meeting with President Donald Trump, who called it the "largest AI infrastructure project in history."

The goal is to kickstart building more datacenters to expand computing capacity for current and future AI projects, including OpenAI's goal of "AGI," which the company defines as a highly autonomous AI system that "outperforms humans at most economically valuable work."

"This infrastructure will secure American leadership in AI, create hundreds of thousands of American jobs, and generate massive economic benefit for the entire world," wrote OpenAI in a press statement. "This project will not only support the re-industrialization of the United States but also provide a strategic capability to protect the national security of America and its allies."

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