Claude Opus 5.5 Is Cutting Off Reverse-Engineering Work. Here’s the Likely Reason

Developers say Claude now halts reverse-engineering tasks mid-answer. Anthropic’s own cyber-access program explains the likely cause, and how to get unblocked.

One Opt-Out for AI Training? OpenAI, Google, Microsoft and Anthropic Back a Shared Robots.txt Signal

Four major AI companies back a single robots.txt label for opting out of AI training. Here’s what it does, when each company will honor it, and what site owners can do now.

Claude Opus 5.5 Is Cutting Off Reverse-Engineering Work. Here’s the Likely Reason

Developers say Claude now halts reverse-engineering tasks mid-answer. Anthropic’s own cyber-access program explains the likely cause, and how to get unblocked.

ChatGPT Will Start Rewriting Advertisers’ Ads Automatically on Oct. 30. Here’s How to Opt Out

OpenAI is turning on automatic headline, image and landing-page changes for ChatGPT ads. Advertisers can opt out, and users can limit ad tracking.

Two Years of High-Dose Fish Oil Did Not Improve Memory in a 365-Person Trial

A two-year randomized trial found 2,000 mg of daily DHA reached the brain but did not improve memory or stop hippocampal shrinkage in at-risk older adults. Here is the fine print.

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Cash Flow 101: Simple Habits That Keep a Small Business Afloat

A business can be profitable on paper and still run out of cash. These basic habits, drawn from SBA and SCORE guidance, help owners see problems coming.

Soil Bacteria Make a “Pac-Man” Enzyme That Eats Bioplastics, and It Can Also Break Down Penicillin

German researchers found a soil-bacteria enzyme with a wide-open active site that breaks down biodegradable plastics and, in lab tests, penicillin. Ordinary polyethylene went almost untouched.

Why Does the Moon Have Two Faces? First Far-Side Rocks Point to Earth’s Pull

Rocks from China's Chang'e-6 mission suggest Earth's gravity heated the young Moon unevenly, pushing crust-building magma to the far side. Here's the evidence, and the catch.

A Fossil That Sat in a Museum Drawer for Nearly 100 Years Is Europe’s First Megaraptor

A skull fragment collected on England’s Isle of Wight and overlooked since 1924 is a new species of claw-handed predator, the first megaraptor confirmed in Europe.

NASA’s Perseverance Rover Breaks the Off-World Driving Record, Passing 28 Miles on Mars

Perseverance has now driven farther than any vehicle on another world, passing Opportunity’s record in about a third of the time. Self-driving software did most of the work.

Two U.S. Economists Win the Nobel for the Ideas Behind How the Fed Fights Recessions

Robert E. Hall of Stanford and Michael Woodford of Columbia share the 2026 economics Nobel for building the models central banks use to steady the economy. Here’s what their work means for interest rates, recessions and your budget.

Heat First, Then Add Fuel: Princeton Lab Maps a Cheaper Route to Fusion Ignition

Physicists at the Princeton Plasma Physics Laboratory updated a 70-year-old fusion rule and found a less energy-hungry path to ignition, plus a warning about tungsten walls.

A Canadian Telescope Picks Up the Faint Glow of Hydrogen From 9 Billion Years Ago

The CHIME radio telescope detected a faint signal from hydrogen gas in the distant universe on its own, a step toward mapping cosmic expansion and testing ideas about dark energy.

Physicists Build the First Working Nuclear Clocks, and One Can Keep Itself in Tune

Two teams report the first clocks that tick with an atomic nucleus instead of electrons. A Vienna prototype even stabilizes itself. Here is how they work and what they could mean.

Halloween Night Is Riskier for Young Pedestrians. Here’s What the Research Says, and How to Stay Safe

A study of 42 years of U.S. crash data found pedestrian deaths rise on Halloween evening, especially among kids ages 4 to 8. Here is what that means and how families and drivers can lower the risk.