Hello,
How is that possible?
The same was a web browser downloads pages of your site, and its resources. Scrappers do the same, they have bots which are crawling your sites and republishing the content on their own.
What do you suggest to do?
To limit the risk of being scrapped, you need to block "suspect" requests. It ends blocking IP ranges which belong to Data Center, since, scrappers will rarely use individual computers (but they can).
As for the immediate issue :
- ideally, you should contact the owner of the site, to ask him to remove the copied content. (chances that this is useless)
- then, you can contact the host, to try to get the site blocked. (depending where the site is hosted it might work or not).
- you can also, contact the ICANN , and explain your problem, and that the site owner, and his web hosts, are not answering your requests. (I did this once, long ago, and it worked, the domain name was null routed).
- you can also report this site, to search engine, to have them delist it.
None of this is sure to work, but in all events, be sure to provide the maximum information, proving your identity, and that you are the original creator of the content.