Captions provided by CCTubes – Captioning the Internet! In the early 1960s, Richard Feynman was quoted as saying that Earth’s center should be a day or two younger than its surface. 50 years later, scientists re-did the math.
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Sources:
http://iopscience.iop.org/article/10.1088/0143-0807/37/3/035602
https://www.sciencealert.com/earth-s-core-is-2-5-years-younger-than-its-crust-thanks-to-the-curvature-of-space-time
https://www.uam.es/personal_pdi/ciencias/jcuevas/Teaching/GPS_relativity.pdf
Images:
https://commons.wikimedia.org/wiki/File:RichardFeynman-PaineMansionWoods1984_copyrightTamikoThiel_bw.jpg
https://commons.wikimedia.org/wiki/File:Spacetime_lattice_analogy.svg
https://commons.wikimedia.org/wiki/File:GPS_Satellite_NASA_art-iif.jpg
https://commons.wikimedia.org/wiki/File:Sun_poster.svg
