4 readings
What If
One hypothetical with a named, checkable premise, followed through the arithmetic to the step where the sums stop and the guessing starts; never medical, financial or legal advice.
What If
USGS figures put Yellowstone's largest eruption at 585 cubic miles of magma, an even 30 cm over 48 states on paper. Three blasts give two gaps, not a due date.
Image credit
"Mammoth Hot Springs, Yellowstone" by Thomas Moran — https://commons.wikimedia.org/wiki/File:Mammoth_Hot_Springs,_Yellowstone_SAAM-1958.5.2_1.jpg — Public domain in the US (published before 1931, as the file page states) and in the EU (author died 1926, life+70); modified: cropped to 16:9 from the 1,425 x 2,000 original, crop box (0, 1199, 1425, 2000) in pixels: the lower terraces and pool with the signature and date kept; the upper sheet with the peak and steam removed
Image credit
"Maan. Photograph of the Moon" by Lewis M. Rutherfurd — https://commons.wikimedia.org/wiki/File:Maan_Photograph_of_the_Moon_(titel_op_object),_RP-F-2001-7-1093-2.jpg — Public domain in the US (published before 1931) and in the EU (author died 1892, life+70); modified: cropped from a photograph of the open book to the plate and its printed caption, film grain removed with a 3 px median, card view cropped to 16:9
Image credit
"Aurora Borealis (Plate IV, The Trouvelot Astronomical Drawings)" by É. L. Trouvelot — https://commons.wikimedia.org/wiki/File:Trouvelot_-_Aurora_Borealis_-_1872.jpg — Public domain in the US (published 1881) and in the EU (author died 1895, life+70); modified: cropped to 16:9, keeping the rays and the treeline; plate margins and printed title and date line removed
Image credit
"Gibraltar engraving" by unknown creator — https://commons.wikimedia.org/wiki/File:Gibraltar_engraving_1852.jpg — Public domain in the US (published 1853) and in the EU (anonymous engraver, published 1853, 70 years passed); modified: scan speckle removed with a 3 px median, card view cropped to 16:9
