My friends keep forwarding articles and stuff through emails which , in their view, could be of interest to me. I would like to see the original source of these articles on the Internet. How can I ?

the best place to start (as I've been saying for years) is Snopes.com.

when you go to the site, you can click on an icon that best represents your email subject, or you can type in a phrase in their search engine. for example: "fried chicken head" (remember that one?) It's a true case. But it's one of the few.