Antarctica’s “Doomsday Glacier” Could Raise Sea Levels Twice as Much as Predicted, New Model Finds

A new model of Thwaites Glacier projects up to 30 mm of sea-level rise by 2100, about double earlier estimates. Here is what changed and what the study can’t yet prove.

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.

Regular Tea Drinkers Had Fewer Heart and Vascular Problems in a 486,000-Adult Study

A study of nearly 486,000 adults in China linked regular tea to an 11% lower risk of vascular disease. The catch: very hot tea was linked to higher risk.

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Small Business Saturday Is Nov. 28: How to Start Planning Now

Small Business Saturday falls on Nov. 28, 2026. Here's a practical timeline for independent shops to line up marketing, hours and online listings before the holiday rush.

Alaska’s Record-Size Tsunami Left Warning Signs. Scientists Say a Monitoring System Could Have Helped

A landslide in Alaska’s Tracy Arm fjord sent a wave 1,580 feet up the walls in 2025. Researchers say thousands of small tremors and a retreating glacier were clues a monitoring system could use.

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.

Coffee Calories Are Up Nearly 40% in 15 Years, and Creamer Is the Biggest Reason

A Tufts analysis of 30,000 U.S. adults found coffee calories rose from about 43 to 60 a day, with non-dairy creamer now the largest source of added calories. Here is what that does and does not tell us.