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3. https://www.mskcc.org/news/hot-times-radium-hospital-history-radium-therapy-msk.

4. https://www.thenakedscientists.com/articles/science-features/it-dont-necessarily-glow-bro.

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7. https://www.amnh.org/exhibitions/darwin/the-world-before-darwin/how-old-is-earth.

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9. https://solarsystem.nasa.gov/solar-system/sun/in-depth/#otp_formation.

10. https://www.mccc.edu/~dornemam/Planet_Walk/Sun/the_sun.htm.

11. https://www.britannica.com/science/black-hole.

12. http://public.virgo-gw.eu/gw150914_en/.

13. https://earthhow.com/earth-timeline-geological-history-events/.

14. https://www.ligo.org/science/GW-Multiple.php.

15. https://www.americanscientist.org/article/the-secret-history-of-gravitational-waves.

16. https://www.mpg.de/10879818 /aei_hannover_jb_2016.

17. https://www.ligo.org/detections/GW150914 .php; https://skyandtelescope.org/astronomy-news/gravitational-wave-detection-heralds-new-era-of-science-0211201644 /.

18. http://www.pflichtlektuere.com/23 /10 /2014 /weshalb-einstein-als-schlechter-schueler-gilt/.

19. https://www.einstein-website.de/z_kids/zeugniskids.html#:~:text=.

20. https://youtu.be/FT8dTB2T4vY?t=170 .