Posted on 04/21/2025 6:44:52 AM PDT by SunkenCiv
Earth's Northern Lights typically dance near the poles, but 41,000 years ago, they lit up skies over North Africa and Australia. New research reveals how dramatically Earth's magnetic field weakened and shifted during an event called the Laschamps geomagnetic excursion, potentially influencing human evolution at a pivotal moment in our history...
During the Laschamps excursion, Earth's magnetic field weakened to just 10% of its current strength, while the magnetic poles shifted dramatically away from the geographic poles...
Using advanced computer modeling, the research team reconstructed Earth's magnetosphere during five key periods of the excursion. At its peak around 40,977 years ago, Earth's protective magnetic bubble shrank dramatically – from its normal extent of 8-11 Earth radii (51,000-70,000 km) to just 2.43 Earth radii (15,498 km).
The magnetic field also transformed from a simple north-south configuration to a complex arrangement with multiple magnetic poles scattered around the planet...
The Laschamps excursion coincided with a critical period in human history – as modern [sic] humans (Homo sapiens) spread throughout Europe, Neanderthals disappeared, [sic] and humans created the first known cave art [sic]...
Modern humans also invented tailored clothing during this period, with archaeological sites containing not just hide scrapers but also sewing implements like needles and awls. This clothing would have allowed for greater mobility while providing coverage and potentially protection from increased radiation.
(Excerpt) Read more at studyfinds.org ...
“I don’t want to read the whole article, does it mention how it affected the refrigerator magnets of the time?”
Dude, did you fail 9th grade science?
well this uneducated human would ponder the guess that they wore clothes before they new what radiation was so... (Scratching head...)
Three of the FRchives topics listed above are in bold, they pertain to the Laschamps excursion, which was a real event.
Depends on what it does to the electric grid.
Neandertals are a major part of our ancestry, IOW, they didn’t go extinct, they made cave art. That’s what the [sic] was about up there. :^)
Depends on your definitions of what evolution is.
If man evolved from eating bugs to eating TV dinners that could be considered evolution. (Then back to bugs)
“We forget what a theory is and they don’t mention it.”
Di you even know what a theory is?
“It is presented as fact.”
Nope. See excerpt below:
Limitations
The study acknowledges several limitations. Conducting a complete numerical simulation of the entire 1,300-year excursion would be computationally prohibitive, which is why they selected specific epochs for detailed modeling. The inner boundary of their magnetospheric model assumes a simple ionospheric shell and isn’t coupled to a dedicated ionospheric solver. Their simulations don’t account for extreme space weather conditions or diurnal variations on the global magnetosphere. Additionally, when mapping auroral displays from the magnetosphere to the upper atmosphere, they relied on a dipolar field line approximation, which may introduce inaccuracies, particularly during periods when the field was highly non-dipolar. The researchers note they’re working on enhancing their models to handle non-dipolar configurations more accurately in future studies.
Just a spot of humor, please give ansel a break.
Thanks.
“But we started to wear clothes to protect from radiation?”
No.
It presented as fact to readers and they accept it as fact.
we even started to wear clothes to protect us from radiation. That is proof presented.
“Just a spot of humor, please give ansel a break.”
This is a science thread, not a stupid joke thread.
If a volcano erupted during this time the polarity of the lava flows can be measured as the position of north and south would be frozen at that time.
“we even started to wear clothes to protect us from radiation. “
Not in article.
At least you don’t challenge my knowledge of history.
tt!!
that makes sense...
Modern humans also invented tailored clothing during this period, with archaeological sites containing not just hide scrapers but also sewing implements like needles and awls. This clothing would have allowed for greater mobility while providing coverage and potentially protection from increased radiation.
As soon as you reach this: “Using advanced computer modeling, the research team reconstructed Earth’s magnetosphere ... around 40,977 years ago,...” - you can safely stop reading.
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