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RE: SOME MYSTERIES ABOUT THE EARTH: SOME THINGS MOST PEOPLE DO NOT KNOW ABOUT EARTH.
Hi, always add references to your STEM (Science, Technology, Engineering and Mathematics) posts. Also, ensure the images are free of copyright issues, for more on that please check this post
https://steemit.com/steemstem/@steemstem/guidelines-on-copyright-standards-in-steemstem