Highly probable to allow them to hide from solar radiation. Memory of previous solar flares and radiation.
According to @grok -
Around 41,000–42,000 years ago, Earth experienced the Laschamp (or Laschamps) event (also called the Adams Transitional Geomagnetic Event), a geomagnetic excursion—not a full permanent polarity reversal—during the Last Glacial Period.
During this roughly 800–1,000-year episode (with the deepest phase lasting a few hundred years), Earth��s magnetic field weakened dramatically—to as low as ~0–6% (or more commonly cited ~5–10%) of its modern strength—and its configuration became complex and multipolar rather than a simple dipole. The poles shifted significantly (magnetic north wandered toward lower latitudes, including over Europe in some reconstructions).
Why this led to increased radiation
Earth’s magnetic field (and the solar wind’s magnetic field) normally deflects much of the incoming galactic cosmic rays (high-energy particles from outside the solar system) and solar energetic particles. With the field so weakened:
•Far more cosmic rays and solar particles reached the upper atmosphere.
•This increased atmospheric ionization, boosted production of cosmogenic isotopes (notably radiocarbon-14 and beryllium-10, which leave clear signals in tree rings, ice cores, and sediments), and allowed greater penetration of radiation toward the surface.
•The event overlapped with one or more Grand Solar Minima (prolonged periods of low solar activity). Even though surface solar activity was quieter, the Sun’s weakened magnetic field reduced heliospheric shielding, further increasing the flux of galactic cosmic rays.
Models and proxy data indicate effects such as:
•Partial ozone depletion in the stratosphere.
•Increases in ultraviolet (UV) radiation reaching the surface (estimates around 10–15% in some scenarios, higher in shorter UV wavelengths under extreme assumptions).
•More widespread and intense auroras, potentially visible at much lower latitudes (down to ~40° or even into subtropical regions).
•Possible changes in atmospheric chemistry and circulation that could influence climate patterns.
Evidence
High-precision dating comes especially from ancient New Zealand kauri trees preserved in sediments. Their tree-ring radiocarbon records show a sharp spike in atmospheric ¹⁴C that aligns with the Laschamp timing and with ¹⁰Be peaks in Greenland and Antarctic ice cores. Magnetic signatures in lava flows (the original Laschamps/Olby sites in France) and sediment cores worldwide confirm the field changes.
Possible environmental and biological impacts (debated)
Some research (notably a 2021 study using the kauri-tree chronology and climate modeling) links the event to a “global environmental crisis”: climate shifts, increased lightning and extreme weather in certain regions, megafaunal extinctions (especially in Australia), and pressure on Neanderthal populations in Europe. It has also been suggested that increased UV/cosmic radiation may have encouraged behavioral adaptations in early modern humans, such as greater use of caves, tailored clothing, and ochre (as a possible sunscreen or pigment).
In short, the Laschamp event is the clearest case of a major temporary collapse of Earth’s geomagnetic shield ~40–42 kyr ago that allowed substantially higher fluxes of solar and cosmic radiation into the atmosphere. It is well documented in the geological and radiocarbon records, but the precise scale of its effects on climate, ecosystems, and early humans is still an active area of research and debate.
NEVER BEFORE SEEN RUINS FINALLY EXCAVATED!
Today is a massive victory to all “conspiracy theorists & pseudo-archaeologists” who rightfully called out the Olive Trees that were planted on top of ancient ruins at GOBEKLI TEPE
As a result of the global backlash, authorities in Turkey have initiated excavations on the North side of the hill. Yet a significant % still awaits excavation
This is a great first step in the right direction, which is literally decades overdue
Now we wait and see to what extent the roots (of the nearly 1,000 olive trees) have done to damage the ruins that layer buried all this time…
Bro… el ingeniero que CREÓ Claude Code soltó un video de 28 minutos y me voló la cabeza
Olvídate de los prompts genéricos que todo el mundo copia y pega
Este tipo te enseña exactamente cómo sacar el 300% de Claude: archivos CLAUDE.md, memoria permanente, sesiones paralelas y trucos de prompting que nadie te cuenta
Pagué cursos de 300 dólares que no llegan ni a la mitad de lo que él explica en los primeros 10 minutos
Y lo mejor: es gratis
No importa si estás empezando o si ya programas todo el día…
después de ver esto vas a usar la IA de una forma que ni sabías que existía
Guárdalo. Vas a volver mil veces 🔖
El ingeniero que construyo Claude Code acaba de soltar un video de 28 minutos donde te enseña a escribir prompts que realmente funcionan
He visto cursos de 300 dolares que no llegan ni a la mitad de lo que explica en los primeros 10 minutos
Archivos CLAUDE.md, atajos de memoria, sesiones paralelas y patrones de prompting que cambian el juego
Todo en un solo video y completamente gratis
Da igual si eres principiante, desarrollador o ya llevas meses usandolo
Esto te va a hacer usar Claude como nunca antes