Earth Used to Have 19-Hour Days (and Pluto Has Dunes!)

According to a new model, days on Earth used to really fly by, and today Pluto has wind-swept dunes made of very weird sand.

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Sources:
http://science.sciencemag.org/content/sci/360/6392/992.full.pdf
http://www.latimes.com/science/sciencenow/la-sci-sn-pluto-methane-dunes-20180531-story.html#nws=mcnewsletter

www.pnas.org/cgi/doi/10.1073/pnas.1717689115
https://www.eurekalert.org/pub_releases/2018-06/uow-ttm053118.php
http://www.indiana.edu/~geol105/images/gaia_chapter_4/milankovitch.htm
https://www.packtpub.com/big-data-and-business-intelligence/bayesian-analysis-python
https://towardsdatascience.com/probability-concepts-explained-bayesian-inference-for-parameter-estimation-90e8930e5348
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Images:
https://en.wikipedia.org/wiki/File:Earth_formation.jpg
https://www.nasa.gov/image-feature/space-station-crew-sees-lots-of-clouds/
https://www.nasa.gov/image-feature/galileo-earth-and-moon
http://www.eso.org/public/usa/videos/eso1436c/
https://commons.wikimedia.org/wiki/File:Nh-pluto-in-true-color_2x_JPEG-edit-frame.jpg
https://en.wikipedia.org/wiki/File:Arbol_de_Piedra.jpg
https://commons.wikimedia.org/wiki/File:Sahara_desert.jpg
https://en.wikipedia.org/wiki/File:Pluto-01_Stern_03_Pluto_Color_TXT.jpg
https://en.wikipedia.org/wiki/Sputnik_Planitia#/media/File:Mountainous_Shoreline_of_Sputnik_Planum_(PIA20198).png
https://commons.wikimedia.org/wiki/File:Blue_hazes_over_backlit_Pluto.jpg
https://commons.wikimedia.org/wiki/File:PIA19947-NH-Pluto-Norgay-Hillary-Mountains-20150714.jpg
https://www.nasa.gov/image-feature/pluto-s-brilliant-heart
https://www.istockphoto.com/vector/sun-rising-background-on-landscape-hill-and-tree-gm815511810-132059067