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Iceland Deems Possible Atlantic Current Collapse A Security Risk

Slashdot.org - Thu, 11/13/2025 - 08:00
Iceland has formally classified the potential collapse of a major Atlantic Ocean current system a national security threat, warning that a disruption could trigger a modern-day ice age in Northern Europe and destabilize global weather systems. The move elevates the risk across government and enables it to strategize for worst-case scenarios. Reuters reports: The Atlantic Meridional Overturning Circulation, or AMOC, current brings warm water from the tropics northward toward the Arctic, and the flow of warm water helps keep Europe's winters mild. But as warming temperatures speed the thaw of Arctic ice and cause meltwater from Greenland's ice sheet to pour into the ocean, scientists warn the cold freshwater could disrupt the current's flow. A potential collapse of AMOC could trigger a modern-day ice age, with winter temperatures across Northern Europe plummeting to new cold extremes, bringing far more snow and ice. The AMOC has collapsed in the past - notably before the last Ice Age that ended about 12,000 years ago. "It is a direct threat to our national resilience and security," Iceland Climate Minister Johann Pall Johannsson said by email. "(This) is the first time a specific climate-related phenomenon has been formally brought before the National Security Council as a potential existential threat." Elevation of the issue means Iceland's ministries will be on alert and coordinating a response, Johannsson said. The government is assessing what further research and policies are needed, with work underway on a disaster preparedness policy. Risks being evaluated span a range of areas, from energy and food security to infrastructure and international transportation. "Sea ice could affect marine transport; extreme weather could severely affect our capabilities to maintain any agriculture and fisheries, which are central to our economy and food systems," Johannsson said. "We cannot afford to wait for definitive, long-term research before acting."

Read more of this story at Slashdot.

Defending Search users from “Parasite SEO” spamDefending Search users from “Parasite SEO” spamChief Scientist, Search

GoogleBlog - Thu, 11/13/2025 - 05:45
The investigation announced today into our anti-spam efforts is misguided and risks harming millions of European users.
Categories: Technology

Alien: Earth Renewed For Second Season

Slashdot.org - Thu, 11/13/2025 - 05:00
FX has renewed Alien: Earth for a second season and signed creator Noah Hawley to a massive nine-figure overall deal with Disney Entertainment Television. Deadline reports: Inspired by Ridley Scott's sci-fi thriller film Alien, Hawley adapted the film franchise for television with the strong support of Scott Free and its president, David W. Zucker, who is an executive producer of the series. It earned a positive reaction from fans, posting a 94% Certified Fresh rating from Rotten Tomatoes and a Metacritic Must-Watch score of 85. "It has been our great privilege to work with Noah for more than a decade on some of FX's best and biggest shows, and we are thrilled to extend our partnership well into the future," said FX Chairman John Landgraf. "Noah never stops surprising us with truly original stories -- and his unique ability to bring them to vibrant life as a director and producer as well as writer makes him extraordinary. We can't wait to get to work on the next season of Alien: Earth, as well as some equally exciting future projects in advanced development."

Read more of this story at Slashdot.

Google Pixel and Golden Goose partner to bring AI to global ateliersGoogle Pixel and Golden Goose partner to bring AI to global ateliers

GoogleBlog - Thu, 11/13/2025 - 03:00
Advances in AI have opened up the possibilities for greater personalisation in the fashion world. Exploring this intersection between technology and high fashion, we’re …
Categories: Technology

Scientists Watch Supernova Shockwave Shoot Through a Dying Star For First Time

Slashdot.org - Thu, 11/13/2025 - 02:00
For the first time, astronomers captured the shockwave of a supernova bursting through the surface of a dying red supergiant star, revealing a surprisingly symmetrical, grape-shaped explosion. Space.com reports: Seeing this moment in detail has previously been elusive because it's rare for a supernova to be spotted early enough and for telescopes to be trained on it -- and when they have been, the exploding star has been too far away. So, when supernova 2024ggi went boom on April 10, 2024 in the relatively nearby spiral galaxy NGC 3621, which is 22 million light-years away in the constellation of Hydra, the Water Snake, astronomer Yi Yang of Tsinghua University in Beijing knew he had to act. Although the supernova itself couldn't be resolved as anything put a point of light, the polarization of that light held the clues as to the geometry of the breakout. "The geometry of a supernova explosion provides fundamental information on stellar evolution and the physical processes leading to these cosmic fireworks," said Yang. "Spectropolarimetry delivers information about the geometry of the explosion that other types of observation cannot provide because the angular scales are too tiny," said another team-member, Lifan Wang of Texas A&M University. The measurement showed that the shape of the breakout explosion was flattened, like an olive or grape. Crucially, though, the explosion propagated symmetrically, and continued to do so even when it collided with a ring of circumstellar material. "These findings suggest a common physical mechanism that drives the explosion of many massive stars, which manifests a well-defined axial symmetry and acts on large scales," said Yang. The findings will allow astronomers to rule out some models and strengthen others that describe what drives the shockwave in a supernova explosion. The findings have been described in a paper on the ESO website.

Read more of this story at Slashdot.

529 Plan Asset Allocation: Default Glide Path vs. Custom?

MyMoneyBlog.com - Thu, 11/13/2025 - 01:11

My last post on treating your kids’ 529 plans as the equivalent of Roth IRAs had me thinking again about asset allocation.

  • If you plan on spending your 529 assets when your child is age 18-21, then your time horizon starts to get very short, very quickly.
  • If instead you plan on your 529 assets to be eventually rolled over into a Roth IRA, then your time horizon is several decades! In that case, why not 100% equities and let it ride?

If you use the Rule of 72 and assume very roughly that it will double every 10 years, then after 60 years you will have 64 times (!) what you put in initially. Of course with inflation that won’t be as impressive, but still.

Most 529 owners use the age-based or target-enrollment portfolios from their plan provider. Some only offer one flavor, while others split it into “conservative, moderate, and aggressive” versions. Morningstar analyzed them all in their 529 landscape report and found that they start on average with ~90% stocks and “glide” down to ~16% stocks when the beneficiary turns age 18. Up top is their graphic of average glide path.

I’ve always found this to be a pretty fast descent. If you look carefully, that means that 20% of the stocks you bought when your kid was age 1 might be sold by the time they are age 6 and 50% sold by age 11. That’s not a very long holding period.

Instead, I decided to start out 100% stocks with the idea that I wanted a long 15 year period of holding stocks for any wobbles to even out, and the plan is to reduce the stock exposure rapidly around high school (10% a year stocks to bonds over the last 5 years or so). I’ve been very fortunate with the high overall stock returns for the last 10+ years. Perhaps I’m pushing my luck now and should cut back sooner to be more in line with these institutionally-approved glide paths. But maybe if stocks tank right before age 18, I’ll just leave some in for a future Roth IRA?

Morningstar also recently updated their Top 5 plans and they mention that Utah (the one I use) remains the only top option that offers a custom glide path option where you can plan it out once and it will follow it for you. For the rest, you’d have to manually make the changes as most plan allow you to change the asset allocation at least once a year.

Categories: Finance

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