A group of Cornell computer scientists has unveiled what they believe could be a new tool in the fight against AI‑generated video, deepfakes and doctored clips.

The watermarking technique, called “noise‑coded illumination,” hides verification data in light itself to help investigators spot doctored videos. The approach, devised by Peter Michael, Zekun Hao, Serge Belongie and assistant professor Abe Davis, was published in the June 27 issue of ACM Transactions on Graphics and will be presented by Michael at SIGGRAPH on August 10.

The system adds a barely perceptible flicker to light sources in a scene. Cameras record this pseudo-random pattern even though viewers cannot detect it, and each lamp or screen that flickers carries its own unique code.

As an example, imagine a press conference filmed in the White House briefing room. The studio lights would be programmed to flicker with unique codes. If a viral clip from that press conference later circulates with what appears to be an inflammatory statement, investigators can run it through a decoder, and by checking whether the recorded light codes line up, could determine whether the footage was doctored.

“Each watermark carries a low‑fidelity, time‑stamped version of the unmanipulated video under slightly different lighting. We call these code videos,” said Abe Davis, assistant professor of computer science at Cornell. “When someone manipulates a video, the manipulated parts start to contradict what we see in these code videos, which lets us see where changes were made. And if someone tries to generate fake video with AI, the resulting code videos just look like random variations."

While the scientists acknowledge that rapid motion and strong sunlight can hinder the technique’s efficacy, they are bullish on its utility in settings like conference‑room presentations, television interviews or lecture‑hall speeches.

This article originally appeared on Engadget at https://www.engadget.com/cybersecurity/flickering-lights-could-help-fight-misinformation-155829489.html?src=rss

©

© Anna Barclay via Getty Images

A new Department of Energy report “fundamentally misrepresents” climate research and leaves out key context, multiple scientists cited in the report tell WIRED.

Builders in ancient Rome used a special kind of ancient concrete to construct their aqueducts, bridges, and buildings. But is Roman concrete more sustainable than the Portland cement used in today's concrete? The answer is more nuanced than one might think, according to a new paper published in the journal iScience. Roman concrete produces as much CO₂ as modern methods, but fewer air pollutants.

As we've reported previously, like today's Portland cement (a basic ingredient of modern concrete), ancient Roman concrete was basically a mix of a semi-liquid mortar and aggregate. Portland cement is typically made by heating limestone and clay (as well as sandstone, ash, chalk, and iron) in a kiln. The resulting clinker is then ground into a fine powder, with just a touch of added gypsum—the better to achieve a smooth, flat surface. But the aggregate used to make Roman concrete was made up of fist-sized pieces of stone or bricks.

Scientists have long been fascinated by the remarkable longevity of Roman concrete; it's a very active field of study. For instance, in 2017, scientists analyzed the concrete from the ruins of sea walls along Italy's Mediterranean coast, which have stood for two millennia despite the harsh marine environment. That analysis revealed that the recipe involved a combination of rare crystals and a porous mineral. So exposure to seawater generated chemical reactions inside the concrete, causing aluminum tobermorite crystals to form out of phillipsite, a common mineral found in volcanic ash. The crystals bound to the rocks, preventing the formation and propagation of cracks that would have otherwise weakened the structures.

Read full article

Comments

© James Cocks/CC BY-SA 3.0

Back-to-back engine failures doomed a privately developed Australian rocket moments after liftoff Tuesday, cutting short a long-shot attempt to reach orbit with the country's first homegrown launch vehicle.

The 82-foot-tall (25-meter) Eris rocket ignited its four main engines and took off from its launch pad in northeastern Australia at 6:35 pm EDT (22:35 UTC) Tuesday. Liftoff occurred at 8:35 am local time Wednesday at Bowen Orbital Spaceport, the Eris rocket's launch site in the Australian state of Queensland.

But the rocket quickly lost power from two of its engines and stalled just above the launch pad before coming down in a nearby field. The crash sent a plume of smoke thousands of feet over the launch site, which sits on a remote stretch of coastline on Australia's northeastern frontier.

Read full article

Comments

© Gilmour Space

The Trump administration has proposed curbing the government’s ability to regulate greenhouse gases by unwinding rules that control emissions from fossil fuel drilling, power plants, and cars.

Environmental Protection Agency Administrator Lee Zeldin on Tuesday announced the proposed rollback of a 2009 declaration that determined carbon dioxide and other greenhouse gases are a danger to public health and welfare.

“With this proposal, the Trump EPA is proposing to end 16 years of uncertainty for automakers and American consumers,” said Zeldin.

Read full article

Comments

© Harvey Schwartz | Getty Images

It's undeniable that the rise of the Internet had a profound impact on cartooning as a profession, giving cartoonists both new tools and a new publishing and/or distribution medium. Online culture also spawned the emergence of viral memes in the late 1990s. Michelle Ann Abate, an English professor at The Ohio State University, argues in a paper published in INKS: The Journal of the Comics Studies Society, that memes—specifically, image macros—represent a new type of digital comic, right down to the cognitive and creative ways in which they operate.

"One of my areas of specialty has been graphic novels and comics," Abate told Ars. "I've published multiple books on various aspects of comics history and various titles: everything from Charles Schulz's Peanuts to The Far Side, to Little Lulu to Ziggy to The Family Circus. So I've been working on comics as part of the genres and texts and time periods that I look at for many years now."

Her most recent book is 2024's Singular Sensations: A Cultural History of One-Panel Comics in the United States, which Abate was researching when the COVID-19 pandemic hit in 2020. "I was reading a lot of single panel comics and sharing them with friends during the pandemic, and memes were something we were always sharing, too," Abate said. "It occurred to me one day that there isn't a whole lot of difference between the single panel comics I'm sharing and the memes. In terms of how they function, how they operate, the connection of the verbal and the visual, there's more continuity than there is difference."

Read full article

Comments

© Jennifer Ouellette via imgflip

“We will drill, baby, drill,” President Donald Trump declared at his inauguration on January 20. Echoing the slogan that exemplified his energy policies during the campaign, he made his message clear: more oil and gas, lower prices, greater exports.

Six months into Trump’s second term, his administration has little to show on that score. Output is ticking up, but slower than it did under the Biden administration. Pump prices for gasoline have bobbed around where they were in inauguration week. And exports of crude oil in the four months through April trailed those in the same period last year.

The White House is discovering, perhaps the hard way, that energy markets aren’t easily managed from the Oval Office—even as it moves to roll back regulations on the oil and gas sector, offers up more public lands for drilling at reduced royalty rates, and axes Biden-era incentives for wind and solar.

Read full article

Comments

© Jose Luis Stephens | Getty Images

Firefly Aerospace seeks to raise more than $600 million through a public stock offering, an arrangement that would boost the company's market valuation to nearly $5.5 billion, according to a document filed with the SEC on Monday.

The launch of Firefly's Initial Public Offering (IPO) comes as the company works to build on a historic success in March, when Firefly's Blue Ghost lander touched down on the surface of the Moon. Firefly plans to sell 16.2 million shares of common stock, at a price of between $35 and $39 per share. Under those terms, Firefly could raise up to $631.8 million on the public market.

Firefly has applied to list its common stock on the NASDAQ Global Market under the ticker symbol "FLY."

Read full article

Comments

---

Google DeepMind unveils AlphaEarth Foundations, an AI system that processes satellite data 16x more efficiently to create detailed Earth maps for tracking deforestation, climate change, and environmental shifts.Read More

---

Runloop raises $7M seed funding to solve the "production gap" for AI coding agents, providing enterprise infrastructure that helps companies deploy autonomous coding assistants six months faster than building in-house solutions.Read More

---

Nightfall AI launches Nyx, the first autonomous data loss prevention platform using AI to cut false alerts by 90% and protect enterprise data from insider threats and ChatGPT leaks.Read More

---

Prophet Security raises $30 million to launch a fully autonomous AI cybersecurity platform that investigates and responds to threats without human intervention, promising 10x faster response times and 96% fewer false positives.Read More

---

OpenAI launches ChatGPT Study Mode, transforming AI from an answer engine into a Socratic tutor that guides students through problems step-by-step rather than providing direct solutions.Read More

---

Sparrow's platform has grown 14x since 2021, with 1,000-plus companies using it to save $200M in payroll costs.Read More

---

Writer's Action Agent is an autonomous AI that executes complex enterprise tasks across 600 tools, outperforming OpenAI on key benchmarks.Read More

---

AI infrastructure startup E2B secures $21 million funding with 88% Fortune 100 adoption rate, powering secure AI agent deployments at scale.Read More

An 8.8 magnitude earthquake rocked the Russian coast on Tuesday, July 30, triggering a tsunami that sent waves as far as the U.S. west coast.

Once dismissed as just snoring, sleep apnea is now emerging as an early warning sign for serious conditions like Alzheimer’s, heart disease, and depression.

Patients with Ehlers-Danlos Syndrome are six times more at risk for the sleeping disorder. Now scientists are studying them in hopes of finding remedies beyond the CPAP machine.

Stress, isolation, and uncertainty appear to have caused the brain to age quicker for those who lived through the crisis.