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Here, 180 leopard #sharks have been tracked using #computervision from #drone footage captured off #SanDiego (that's a harbor seal that spooks a few of the sharks). Next three tweets show tracking results. Point Loma Nazarene University Scripps Institution of Oceanography #sharkscience #SharkWeek #Tech4Wildlife (1/4)

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📢 Our lab has been exploring 3D world models for years — and we’re thrilled to share **PhysTwin**: a milestone that reconstructs object appearance, geometry, and dynamics from just a few seconds of interaction! Led by the amazing Hanxiao Jiang 👉 PhysTwin combines **Gaussian splatting** with **inverse dynamics optimization** based on simple **spring-mass** systems. ⚙️ The result? Real-time, action-conditioned 3D video prediction under novel interactions (i.e., 3D world models). 🔑 A few key takeaways: 1. Having the right structure (e.g., particles/masses) helps navigate the trade-off between sample efficiency, generalization, and broad applicability. 2. Visual foundation models (VFMs) have matured to the point where they can provide rich supervision for world modeling (e.g., tracking, shape completion). 3. Beyond VFMs, many crucial components have come together in recent years: Gaussian splats for rendering, NVIDIA Warp for high-performance simulation, and scene/asset generation from a wide range of labs and companies. The future of 3D world models is looking bright! ✨ 4. The resulting digital twin supports a wide range of downstream applications—especially in data generation and policy evaluation, thanks to its realistic rendering and simulation capabilities. 🎥 All code and data to reproduce the results, along with interactive demos, are available on the website. Check the following visualizations of: (1) observations, (2) reconstructed state/actions, (3) interactive digital twins, and (4) the overlays between real-world robot teleoperation and our model’s open-loop predictions.

Yunzhu Li

25,279 views • 1 year ago

BREAKING: FIRE and College Pulse have just released the 2025 College Free Speech Rankings. Surveying 58K+ students from 257 institutions, the results find that free speech has been threatened in historic ways since the Israel-Hamas war began. Expand to learn more ⬇️ 🟡 UVA was ranked as this year’s best school for free speech! Michigan Technological University, Florida State University, Eastern Kentucky University, and Georgia Tech round out the top five. 🔴 Harvard University is ranked as the worst school for free speech for the second year in a row. Columbia University and New York University round out the bottom three — each earning an “abysmal” rating. 🔴 Campus deplatforming attempts spiked by 400% since Hamas’ October 7th attack on Israel. 🔴 7 out of 10 students are uncomfortable publicly disagreeing with a professor about a controversial political topic. 🔴 54% of students report it’s difficult to talk about the Israeli-Palestinian conflict. On 17 campuses where this issue was especially contentious, 75% or more marked the Israeli-Palestinian conflict as difficult to discuss. 🔴 1 in 4 students said it was unclear whether their college administration protects free speech. 🔴 1/3 of students approve of the use of violence at least “rarely” to stop campus speakers. 🔴 7 out of 10 students say it's at least “rarely okay” to shout down a speaker. Given all of this, it is unsurprising that American confidence in higher education is at a record low.

FIRE

166,491 views • 1 year ago

Today was milestone for me that was a long time coming as I finally was able to tour Giga Berlin along with three of the original drone pilots that showed the world the factory as it began it’s construction back in early 2020 all the way to present day as a world-class & mature factory. Tobias Lindh has been providing ground & drone views for over 6 1/2 years, from the very beginning, with the first tree removal necessary for the earthwork for the foundation to get underway & then construction of the factory proper. He continues to provide us coverage of the factory & inspired me to try to cover Giga Texas way back in 2020. The Wolfpack Berlin - Robert & Andreas brothers Andreas & Robert also began covering Giga Berlin from the very beginning & featured well edited and beautiful cinematic drone flights over the factory for the first several years. They also inspired me to improve how I flew my drone and edited my videos. Together, Tobias, Andreas & Robert played an important role informing a world-wide audience of the progress of the factory. We had a great tour of the factory, along with Tesla Welt - german Podcast about Tesla, werk.lab & PIT HOSTΞTTLΞR 🇨🇭 , seeing much of the operation of Giga Berlin & I benefitted by getting insights & observations from the three drone operators that literally have watch everything arrive, be installed and put into operation over the past 6+ years. I did individual interviews with each of them and those will be coming out soon! For now, here are a few teasers & photos of us in the factory. Thanks to Tesla & lifeatgigaberlin for meeting with us and giving us a great tour!

Joe Tegtmeyer 🚀 🤠🛸😎

21,253 views • 1 month ago

🇷🇺 Why wasn't the Omsk oil refinery better protected? 😁🔽 “Ukrainian drones reached the Omsk refinery — the largest in the country, accounting for almost 10% of all oil refining. The refinery supplies all of Western Siberia and the Urals. It is reported that FP-1 drones struck a unit with a capacity of 8.4 million tons of oil per year out of the plant’s total capacity of 22 million tons. The Omsk refinery is such an obvious and attractive target that it was bound to be reached sooner or later. And it was. From the Ukrainian border to Omsk is more than 2,500 km. The FP-1 flies at a speed of 140–180 km/h — that is 14–17 hours of flight in a straight line, but the drone most likely had to bypass air defense zones, so it would have taken longer. That means it took off yesterday evening and arrived today during the day. And this is a slow propeller-driven device that could have been detected in advance, its target could have been predicted, and it could have been tracked all the way to Omsk. In that time, mobile groups could have been redeployed, local forces alerted, aviation scrambled. Twenty hours, after all. Why didn’t this happen? Once again, the answer, I think, should be sought not in technology but in the structure of the Russian vertical of power itself. Imagine officials at all levels, from the Kremlin to Omsk. To organize any kind of defense system, someone has to take the initiative: find resources, involve unusual, non-system people who might be able to solve such tasks, although it’s not certain. Coordinate it with a dozen agencies, agree on coordination without calls to Moscow, cover everything with paperwork so as not to later be prosecuted for misuse of funds. And even after all that, there is still a high chance the drone will break through — and then they will have to figure out how exactly it got through and rebuild the defense again. But the main question is — who will be responsible for the first failure? That very initiative-taking official who made the decision himself? He is supposed to be held accountable for the failure. So he will be removed. By the way, until he showed up, everything was calm, Ukrainian drones weren’t arriving, and as soon as he started being active — they started arriving immediately. Maybe he’s an SBU agent, huh? Let’s be honest — would you, in his place, take on defending an oil refinery?” — Russian political blogger Igor Dimitriev Video: Exilenova+

Natalka

42,788 views • 8 days ago

A pro-Palestinian 🇵🇸 group slashed and spray-painted a century-old portrait of the author of the Balfour Declaration at the University of Cambridge in England 🏴󠁧󠁢󠁥󠁮󠁧󠁿 In March 2024; a pro-Palestinian group slashed and spray-painted a century-old portrait of Arthur James Balfour at the University of Cambridge on Friday, defacing a painting of the British official whose pledge of support in 1917 for “the establishment in Palestine of a national home for the Jewish people” helped pave the way to Israel’s founding three decades later. The group, Palestine Action, said in a statement that the destruction of the portrait in Trinity College, Cambridge, was intended to call attention to “the bloodshed of the Palestinian people since the Balfour Declaration was issued,” particularly in light of the current conflict in Gaza. A spokeswoman for Trinity, whose alumni include King Charles III as well as Balfour himself, said in a statement on Friday that the college “regrets the damage caused to a portrait of Arthur James Balfour during public opening hours” and that it had notified the police. A Cambridge police statement said officers were on the scene to investigate a report of “criminal damage.” Palestine Action posted a video of a protester first spraying the portrait, painted in 1914 by Philip Alexius de László, with red paint and then slashing it with a sharp object. The group’s statement said Balfour had given away the homeland of the Palestinians — “a land that wasn’t his to give away” — touching off what it described as decades of oppression. Since October 7 - 2023, when Hamas militants invading southern Israel killed approximately 1,200 people and abducted 240 others, Israeli bombings and invasions have killed more than 30,000 people, according to Gaza health officials. Defacing art has become a popular protest tactic in recent years. It is perhaps most closely associated with environmentalists, who have targeted paintings by van Gogh, Vermeer and Monet. In 2024, two women from an environmental group entered the Louvre and flung soup at the Mona Lisa. Most of the paintings that have been targeted were covered or protected in some way, and very few were damaged. The pro-Palestinian protesters have targeted art in New York. A few dozen demonstrators disrupted the opening of an Israeli artist’s show at a Manhattan gallery, Hyperallergic reported. In February 2024, protesters interrupted a conversation featuring an Israeli artist whose drawings depicting October 7, 2023 are being exhibited at the Jewish Museum and dozens chanted “Free Palestine” in a demonstration at the Museum of Modern Art. © The New York Times #archaeohistories

Archaeo - Histories

29,959 views • 1 year ago

I have always loved tales of courage in the face of long odds. Maybe that's why To Kill a Mockingbird has always been one of my favorite stories. In a world dominated by groupthink and mob rule, only one man had the courage to swim against the current. It was a world of suspicion, where rumors quietly whispered gave rise to groundless fears. I see parallels between that world and my own. Lucy sits in jail today as the mob kindles their torches and brandishes their pitchforks expecting a lynching, fueled by rumors fed by gossip and lies. She's a bit like Tom Robinson, the gentle black man falsely accused of having raped a white woman. It did not matter that he could not have done it physically. It fit the biases of a fearful society. Sometimes, even I have misunderstood Lucy. Years ago, we got three ducks. They seemed to bond with Lucy. They would sleep next to her and lay down pressed against her. Sometimes even on top of her. She endured it patiently. One day, we found one dead with what seemed to be bite marks on its back. Lucy was holding it in her mouth. Dolly Spice- Jones 🌱🎵 and I were shocked. We began to see her as a loose cannon; guardian and predator in equal measure. We kept her in the house the next few days. Soon another duck died, leaving only a pile of feathers. We observed the final moments of the third duck. Death came from the skies in the shape of an owl striking at dusk. We saw then that it had never been Lucy. Those were not bite marks. They were the marks of talons. Lucy must have come just too late. She was gently holding it because it had been her friend. She was sad. Sheepdogs are easily confused with wolves by the sheep. In reality, they are the only thing keeping the wolves from the sheep. Shortly after we moved here, a bear visited. We could see its footprints. It stayed out of our fields. Our sheepdogs guarded them diligently. The bear also didn't visit our neighbors' houses, where dogs, cats, and children may have been outside, oblivious to the danger that lurked nearby. Our barking dogs protected the neighborhood. One of the following days, it may have even been the next day, my wife got a text from a neighbor complaining about how the barking had made her hot tub less relaxing the previous night. Sheep don't understand sheepdogs. In To Kill a Mockingbird, Boo Radley was misunderstood. Horrific stories and childhood superstitions portrayed him as a monster. A boogeyman. He was neither. He was a sheepdog. He protected children and saved them from murder. Like Lucy protects her ducks. #SaveLucy, the dog who survived war. A few seconds of Lucy with geese and sheep.

Brendan M. Jones 🇺🇸

10,947 views • 1 month ago

Africa GDP (all 54 nations): $3.1 Trillion India GDP: $3.55 Trillion *point: the economy of a nation state is larger than the economies of all the states in the continent. And there are debates about the true scale of informal economy and whether it is captured in the numbers* South Africa GDP: $377.8 Billion Mumbai GDP: $310 Billion *point: a single state is the economy equivalent of the largest most industrialised economy in all of Africa* India population: 1,429 Billion Africa population: 1.527 Billion Point: I just realised that most of my community reading this will not understand what “scale” truly means. Wave after wave after unending wave of businesses, traders, shops, hawkers, merchants, dealers, artisans, engineers, analysts, doctors, engineers, bankers, financiers, realtors, accountants etc. The list is endless. The scale of precision engineering that I witnessed on one of tours. It’s not just low-vector labour work that is at scale. It’s the complex tooling & engineering industries that are also at scale. (Obviously can’t share that material publicly). Just yesterday, during my book signing, I spoke to more engineers, masters students, analysts, cyber security professionals & developers in a single sitting than I have ever had in the past. Ever! Read that again. As my team & I leave for DxB next I am left wondering, “will Africa ever catch up?” I came here thinking we have a chance. I leave thinking we haven’t even arrived at the stadium where the race is happening yet. To the incredible team (picture 3 & 4) that made this immersion happen, God bless you Descriptions: Video 1 is my team & I walking through a random market to understand the scale of the informal economy here. Video 2 was an intimate dinner with some of the most influential business leaders x kingdom builders. VT

VT

84,915 views • 1 year ago

There, in Vyshneve, near Kyiv, after the shelling, there already seem to be about ten people dead. Military depots were located right next to residential neighborhoods, practically adjacent to them, which is strictly, absolutely prohibited. This is a violation of the rules of warfare. THINGS LIKE THIS should be deep underground, under concrete. Instead, it is a criminal offense when military facilities are built inside residential areas or next to civilians. That is using human shields. In Ukraine, of course, nobody thinks about this, because if they did, they would have to put a whole lot of people in prison. But ordinary civilians need to understand that today workshops, assembly facilities, and drone production sites are located in business centers. And then everyone is surprised when those places get hit. Quite often, such workshops are on the ground floor of some educational institution - a college or a technical school. When it gets hit, the standard line is: “A university was hit.” Vyshneve is a very vivid example of how an ammunition depot was placed on a residential street. And now there are already piles of dead bodies. Anti-aircraft batteries are often placed on the roofs of high-rise buildings, and drones are shot down with machine guns. And nobody warns people that they should be evacuated from those buildings. Those buildings then become legitimate military targets. In reality, this is a very, very serious problem. This is happening all over Ukraine right now. Setting aside Russia’s aggression and the inadmissibility of shelling, if you use human shields, you are a scumbag, a monster, and a criminal. Zelensky is using human shields.

Anatolij Sharij

45,141 views • 8 days ago

Though this video might not look like much, it shows something pretty remarkable. This footage, which we captured this past September on the Kabetogama Peninsula, is the first confirmed observation of lynx kittens in Voyageurs National Park (and one of only a few observations of known lynx reproduction in the Greater Voyageurs Ecosystem). Although lynx have been observed/documented in the park sporadically for several decades, there has never been evidence of kittens in the park (i.e., a breeding population of lynx). As a result, most lynx in and around Voyageurs are likely transitory individuals (predominantly males) roaming large area. From 2000 to 2004, biologists with the National Park Service made a concerted effort to study lynx in the park. They only documented the presence of one male and one female, and concluded “lynx were either transient or present at a low density”. Another study from 2007-2008 in and around Voyageurs National Park using trail cameras and snow tracking did not detect the presence of lynx. However, they noted that there were some sightings of lynx outside of the park with one unconfirmed report of a female lynx with a kitten observed to the west of the park. The researchers concluded that “even though patches of high-density snowshoe hare habitat exist in the Voyageurs National Park area, the low density of snowshoe hares at the landscape level would not support resident lynx”. Based on this research and some subsequent work, researchers with the park concluded in 2015 “it does not appear that there are currently resident lynx”. In fact, the researchers in 2012 concluded: ‘only three confirmed observations of adult lynx have occurred within the boundaries of VNP since 2001”. Obviously, studying these elusive animals in places like Voyageurs has historically been difficult because trail camera technology was not what it is today (or did not exist). However, trail cameras have provided a great tool to observe and understand lynx in places like Voyageurs. Skip forward to today: we now routinely get numerous observations of lynx each year in Voyageurs National Park as well as outside the park. Many observations are likely of the same few individuals wandering around, though, based on physical appearances, it seems we are capturing observations of more than 1 or 2 lynx. That said, in general, our trail camera data generally supports the conclusions of the Voyageurs National Park researchers. Most lynx likely are transient individuals, and certainly lynx are at low densities in and around Voyageurs. Nonetheless, this observation of a lynx with two kittens shows that lynx can reproduce in this area, though such occurrences are likely rare. One observation of reproduction is not evidence of a self-sustaining resident population but it suggests it might be possible. Anyway, this finding just highlights how our trail cameras, which are deployed to study wolves, simultaneously capture rare and valuable data on other wildlife species that have been traditionally difficult to study. Sources: Route et al. 2009. Status of Canada lynx in Voyageurs National Park, Minnesota, 2000-2004. National Park Service Report. Moen et al. 2010. Lynx habitat suitability in and near Voyageurs National Park. Natural Areas Journal. Moen and Windels. 2015. Lynx Habitat Suitability. Voyageurs National Park Website.

Voyageurs Wolf Project

24,052 views • 6 months ago

🚨Exciting news for archaeology and for human knowledge in general! It has been a long and tedious process, but the Peruvian Ministry of Culture has finally granted permission to export geological samples that will hopefully enable the age of Sacsayhuaman's construction to be determined! Three types of samples have been collected for analysis using different dating methods, and some of them are already on their way to different labs in the US and in Europe. 1 - Soil samples collected from right beneath the blocks that make up the megalithic walls of Sacsayhuaman for Optically Stimulated Luminescence (OSL) dating – this method is used to determine the time elapsed since minerals like quartz and feldspar were last exposed to sunlight by measuring the light energy (luminescence) released from trapped electrons that accumulated in the mineral crystal lattice due to natural radiation since their last bleaching/reset event (i.e., when the ground was covered by the blocks). 2 - Limestone samples from megalithic blocks, quarry sites and carved bedrock, for Cosmogenic Nuclides dating – this method is used to determine the age of geological surfaces by measuring the accumulation of rare isotopes (mainly ³⁶Cl) produced when the limestone is hit by cosmic rays. 3 - Speleothems samples (calcium carbonate deposits such as stalactite or flowstone) collected on carved surfaces for Uranium-Thorium dating – this method is used to calculate the age of carbonate materials by measuring the buildup of thorium-230 from the slow decay of its uranium-234 parent isotope. This won’t give us the age of the carving of these rocks, but this will give us a minimum age, since the rock was obviously cut before these deposits formed. Additionally, if some organic material is found in the soil or speleothems samples, radiocarbon dating will also be performed, which would give us a fourth means of dating the construction of the site. Whether you believe this megalithic site was built by the Incas or by a much older civilization, science will hopefully put an end to this debate once and for all. And, to top it all off, some limestone samples have also been sent to the Geopolymer Institute of Joseph Davidovits for analysis. This is proof, if any were needed, that not all archaeologists are dogmatic and closed to alternative theories. Now, Let's hope that all these methods will yield results. Whatever these results may be, they will be the subject of a scientific publication, and I will share them here on X, so make sure to follow. This could potentially rewrite history!

Weird Old World

113,042 views • 6 months ago

GM Lot of speculation from the community on the photo I posted showing a container with the "Tether Energy" logo. "Is the site real?", questioned some tabloid. Did Paolo really photoshopped the logo on a container? Did Paolo really start to eat cabbages and vegetables? Well, let's start from the beginning. Tether, as announced since few months, has started Tether Energy ⚡️. TE is growing partnerships around the world with local companies, providing capital, infrastructure support, development and general expertise to build renewable energy production and #bitcoin mining sites. TE is choosing partners that have solid local connections, outstanding and passionate personnel and that demonstrate deep respect for the environment. At Tether we believe that #bitcoin mining has to be as geographically decentralized as possible, with the goal of reducing the current heavy concentration in specific countries. Is the photo real? Yes. That photo shows one of the control rooms in one of the sites that is currently being finalized and will start soon operations. Where? In LATAM. We tend to not share exact locations to avoid personnel harassment, a valid concern given the amount of detractors obsessed with Tether. You can almost hear some of them screaming: "NOOOOOOOO if you don't tell us the address, zip code, surname of the cow that is eating the grass nearby, then it's not real!!!!!" Then why the logo was overimpressed? We thought that the photo would have been shared on newspapers so the team wanted to brand it. And in fact this is exactly what happened. Moreover, putting gigantic Tether logos would not be great from physical privacy of the site point of view. It has been quite entertaining to follow the "GOTCHA!!" moment of some paid groups, desperately hoping to have found the holy grail of their anti-Tether theories, as if companies would not usually put their logos on things they build. "NOOOOOOOO!!! If it's not real paint then the entire thing does not exist!!!" So does it make it less real? No. It's really happening. The site is progressing well, everyone in the team is super excited and working around the clock to start operations in the next few weeks. Can you show something more? Sure, here is the 3D design of how the mining site will look like in a few months

Paolo Ardoino 🤖

357,346 views • 2 years ago