Hi @steemcleaners. My apologies for not getting back to you sooner. The articles I publish on STEEM are all original pieces written by me. They comprise blog posts that I write, and published science and technology articles that I write for various science publishing houses.

If you wish to confirm that they are original writings, please visit my website at https://gluons2galaxies.com.

I hope this clarifies the situation. Please don't hesitate to get in touch if you require further clarification.

Cheers
@carlwilliams