Hello and welcome to Steemit, Michael. Generally if you're copy/pasting other people's writing and not citing who wrote it, it's considered plagiarism. Around here it will earn downvotes. Simply saying "sourced from articles around the web" or copying entire articles and linking to them is also discouraged. If you want to share a cool story like this one, I encourage a more copyright friendly strategy of fair use:

Copy just one paragraph such as the opening paragraph, and/or interesting/choice quotes, include a picture or two if you want, and then link to the original. Adding some personal comment, even if it's small, can add a lot of value to sharing links too, so consider it as well.

Some of your copied posts have been downvoted but I've upvoted your original posts. Posts don't have to be original but they should not be plagiarized, even implicitly (by not citing your text's source, as you've done in this post).