Attn Doom Shills:
Update to existential threat list.
axial tilt
While deep geologic gyrations can have drastic impacts on Earth’s surface, the planet’s magnetic field remains largely unchanged by such events, since it is generated by the churn of molten iron and nickel in our planet’s outer core, some 1,800 miles below the surface. Researchers can therefore turn to iron-rich minerals attuned to magnetic fields to untangle the planet’s past twists and turns. As sediments collect and solidify or lava cools to stone, these minerals align themselves with the global magnetic field like compass needles, recording a snapshot of a region’s location on our planet at a given period in the past."
axial tilt
"one instant (you) are sitting in you chair, the next you are riding in it."
- Chair Expert Imagines
"But not all rocks are perfect stenographers. As sediments are turned to rock, compression can tweak the magnetic signature and impact their inferred planetary position. By removing this sedimentary confusion and looking only at volcanic rocks, Kent and the late Edward Irving, who worked at the Geological Survey of Canada, found the signatures of a monster jump during the Jurassic period. Their results, published in 2010, suggested that Earth’s surface shifted some 30 degrees between 160 and 145 million years ago."
https://www.inverse.com/article/23062-earth-moon-history-axis-tilt