404 Media

2026-06-18 18:00:35

A New Fossil Discovery Just Rewrote 150 Years of Evolutionary Theory

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Ancient fossils have revealed that the earliest animals to walk on land more than 300 million years ago did not experience a metamorphosis similar to modern amphibians, a discovery that rewrites the evolutionary history of terrestrial vertebrates, according to a study published on Thursday in Science.

Humans and all other land-dwelling vertebrates descend from four-limbed “tetrapods” that left the seas to roam on land, an evolutionary process that took tens of millions of years. If you can recall your old biology textbook, this is probably what you were taught it looked like: the pioneering tetrapods adapted to land with a life cycle similar to frogs and toads, in which an aquatic larval phase, like a tadpole, is followed by metamorphosis into an amphibious adult form.

A pair of scientists at the Field Museum in Chicago looked at extremely rare fossils of hatchlings that span the “fin-to-limb” transition to identify direct evidence of this metamorphosis, such as the type of external gills seen on tadpoles. To their surprise, the researchers found no evidence of a transient larval phase in the early animals, thereby “falsifying hypotheses of an ancestral origin of metamorphosis,” according to the new study.

“There's still this sense that these [tetrapods] had this gilled larva that is fundamentally and anatomically different from the terrestrial adult,” said Jason Pardo, a research associate at the Field Museum and a postdoctoral fellow at Vilnius University in Lithuania who co-led the study, in a call with 404 Media. “There are a lot of reasons why that would make sense, because it's easier to make that transition from water to land if your baby, when it hatches out of the egg, is still fish-like, more or less. Then, you have this period of transition that allows it to get itself on land.”

“The problem is that we've never actually had direct evidence of that,” he continued. “The assumption has always been, ‘Of course we had a larval stage, and it would transition into an adult.’ But we didn't really have information that went one direction or the other.”

To fill this gap, Pardo and Arjan Mann, the Field Museum’s assistant curator of early tetrapods and the other co-lead of the study, scoured both public museum archives and private collections for fossils that captured the early hatchling phase of primordial tetrapods.

Such specimens are extremely rare because these baby animals were small and had developing bones that required ideal conditions for preservation. But Pardo and Mann were able to track down a handful of particularly intriguing fossils sourced from the Mazon Creek fossil beds in northern Illinois, which has preserved incredibly detailed snapshots of life as it existed about 310 million years ago, during the tail end of the fin-to-limb transition.

These animals included two embolomeres, which were crocodile-like predators, a snake-like aïstopod, and several megalichthyid fish. Some of the tetrapods were so young when they died that their fossils preserve abdominal yolk that the hatchlings were feeding off until they were mature enough to seek their own food.

This selection represents “the most phylogenetically extensive sample of stem tetrapod early developmental stages to date and a definitive documentation of stem tetrapod hatchling anatomy and life history,” according to the study.
Concept art of an embolomere hatchling next to an adult. Image: Gabriel Ugueto
“We've been trying to look at the smallest animals that we can get out of these sites, where we can actually get very early stage babies,” Pardo said. “This is after the initial transition from water to land, but we have animals that span that transition. We have animals that branched off before [the development of] fingers and toes, and animals that branched off after fingers and toes.”

“When we started to look at these fossils, we were expecting that we were going to get something that looked kind of like a metamorphosis,” he added. “What we ended up finding is that there was no such evidence at all.”

External gills, for instance, are a telltale feature of the metamorphosis observed in frogs and toads. They appear on freshly hatched tadpoles and are slowly absorbed into the body to become lungs. But the hatchlings showed no signs of these gills, or anything else on the “checklist” of a transient larval phase, Pardo said.

“It was very striking that none of the structures that we would look at seemed like larval features that we would expect to see,” he said. “It was quite hard to make sense of at first because, at this point, there’s a 150-year tradition of treating these animals as amphibians.”
Some of the early hatchling fossils studied by the team, including detailed preservation of eyes and soft tissues. The scale bar is 10 millimeters. Image: Jason Pardo, Arjann Mann, Lauer Foundation.
“What we ended up finding is that we can't actually justify any claim of metamorphosis in those animals that are transitioning across that water-to-land transition,” he added.

The results suggest that early tetrapods had the same basic anatomy, more or less, throughout their life cycle. This evolutionary strategy may have delayed the transition to land for much longer than previously assumed, as tetrapods slowly acclimated to life in a terrestrial habitat. Amphibian-style metamorphosis probably emerged well after tetrapods established their foothold on land, perhaps to maximize their colonization of diverse new land environments, rather than as a condition for getting out of the seas in the first place.

In addition to overturning conventional wisdom, the fossils offer a glimpse of the ancient trailblazers that took the first steps into a new realm hundreds of millions of years ago, paving the way for the rest of us. As a result of them gradually expanding onto land, these tetrapods became the progenitors of all vertebrate land animals. The exquisite fossils even include eerily preserved eyes in some cases, gazing out from a long-lost past.

“They look like they were around yesterday,” Pardo said. “You can see skin. Sometimes the animals have color patterns preserved. You can see the lenses in their eyes. You can see these really intricate and intimate details of these animals. You can understand this was a living animal. It's there.”

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2026-06-18 14:22:58

If AI Is Sentient Then So Is ‘Age of Empires II’

In a viral essay about how ludicrous the idea that LLMs are conscious is, science fiction writer Ted Chiang asked us to consider Microsoft Word:

“Being open to the possibility that LLMs are conscious is the same as being open to the possibility that Microsoft Word is conscious, or, more precisely, that multiple distinct consciousnesses are dormant in every Word document containing a conversational transcript, and that they are awakened every time the document is loaded,” Chiang wrote. “Should you consider the possibility that every time you open a Word document, you are bringing multiple conscious interlocutors into existence, and every time you close one, you snuff their existence out? No. Contemplating that scenario is not a good use of your time.”

Let me tell you about a Microsoft AI researcher, then, who recently spent quite a lot of time considering whether the legendary Microsoft real time strategy game Age of Empires II is conscious, and built a basic neural network within the video game using digital goats to prove his point.

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If AI Is Sentient Then So Is ‘Age of Empires II’

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404 Media

2026-06-18 13:23:17

Salesforce’s Internal AI Leaderboard Has Teams Competing for Little Trophies

Salesforce has an internal dashboard which tracks each team’s use of AI, including which teams are using specific tools such as ChatGPT and how much, with the company also handing out digital badges that describe its employees as a “Champion,” “Innovator,” and “Legend” depending on the AI training courses they’ve completed, according to screenshots seen by 404 Media. A leaderboard includes an option to view which teams haven’t yet earned the badges, saying, “click to see who 👀,” with employees concerned that use of AI is going to be tied to their performance reviews.

The leaderboard shows only around a third of all employees have completed the lowest level course. The dashboards also show that use of Salesforce’s own agentic AI product, called Agentforce, has dramatically decreased across many teams, falling as much as 65 percent recently.

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News of the leaderboard comes as Salesforce has attempted a huge pivot to AI, laid off thousands of employees as part of that, and its stock is down more than 20 percent this year. As 404 Media has reported, other tech companies have similar leaderboards, including Amazon which shut down its own after employees cheated to climb its ranks, sometimes to score better on performance reviews.

“People at the company [definitely] pay attention to it,” a current Salesforce employee told 404 Media, referring to the AI leaderboard. “There hasn't been much transparency around the actual expectations for employees in terms of what keeps us off the radar and therefore still employed, but we are all aware that AI usage already is or will soon be tied to performance ratings.” 404 Media gave the source anonymity as they weren’t permitted to speak to the press.

The badges employees can earn start with employees being able to explain agentic AI, up to building advanced customizations, according to a page on Salesforce’s website. Champions can “Confidently explain Agentforce concepts and business impact”; Innovators “Implement Agentforce solutions to drive measurable business outcomes”; and Legends “Understand advanced concepts and design complex strategies.”

Technically anyone, even those outside Salesforce, can earn these badges. The leaderboard tracks people inside the company, though. According to the leaderboard, around 30 percent of all employees have earned the Champion status this year, followed by just over 15 percent for the Innovator badge, and under 10 percent with the Legend status.
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The leaderboard is sorted by executive, with the teams underneath them contributing to the leaderboard, the employee said. It shows President and Chief Engineering and Customer Success Officer Srinivas Tallapragaca at the top of the Champion leaderboard, for example. Followed by President and Chief Strategy Officer David Schmaier and President and COFO Robin Washington. President & CEO of Government Cloud at Salesforce Kendall Collins leads both the Innovator and the Legend leaderboards.

“Execs are pushing everyone hard to use AI tools. If we get a new tool, we are told to start using it. Generally, everyone is supposed to be using AI daily and is supposed to be using all the AI tools made available for their role,” the Salesforce employee said.

One part of the dashboards viewed by 404 Media shows that use of Agentforce, Salesforce’s own platform for building AI agents, is down dramatically across various teams. Various teams all dropped use of the tool by more than 60 percent, and sometimes 70 percent. Slackbot, the AI agent in Slack, which Salesforce owns, use is much higher though, according to the screenshots. ChatGPT is also more popular with many teams than, say, Gemini, according to the screenshots.

404 Media agreed to speak with a Salesforce spokesperson on background because they said they would also provide an on the record statement. In the background call, the Salesforce spokesperson said the boards are not set up to encourage competition nor are they related to performance. All employees have until this summer to earn the badges. At the end of the call, the spokesperson said the company won’t actually provide a statement.

In February 2025, Salesforce laid off more than 1,000 people while it hired salespeople for AI, Bloomberg reported at the time. Then earlier this month, Salesforce laid off employees working, ironically, on the company’s Agentforce AI product, as well as its Mulesoft IT integration tool and its Marketing Cloud software, Business Insider reported.

Salesforce lays off employees in a new round of cuts

The SaaS giant has been hit by concern that AI could replace some traditional software services.

^{Ashley Stewart (Business Insider)}

il Post

2026-06-18 08:49:11

Trump ha scaricato Netanyahu?
https://www.ilpost.it/2026/06/18/trump-netanyahu-accordo-iran/?utm_source=flipboard&utm_medium=activitypub

Pubblicato su News @news-ilPost

Trump ha scaricato Netanyahu?

L’accordo firmato con l’Iran fa pensare che accontentare Israele non sia più tra le priorità del governo americano: è una cosa nuova, e grossa

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