How Those Magazines Get News Releases? What is the Procedure?

When looking for a certain news/press release via Google I've seen a lot of sites publishing the same news releases while giving the credit to the original sources such as AFP, AP or to some other news agency.

As an example take a took at "science daily.com" or "physorg.com". They are filled with thousands of news releases taken from variety of news agencies. My question is how do they get those news releases? What is the procedure do we have to follow if we wanna do the same thing like "sciencedaily" or "physorg"

 

I think you'll need journalists or you become one; take news from news agencies (biggest one is reuteurs) and then rewrite it for your audience.

 

So that means we have to "sign up" with them as journalists? I mean is it something like filling up several online forms and then after paying a little subscription fee we can publish their news? Correct me if i'm wrong.

The other thing is that those magazines are not writing the content for their audience. All are publishing the same news release. The title, the content, the images..every thing is similar to each other. Can you please explain that also?

 

Hello anyone can help me with this.? Or is this the wrong forum to ask a question like this? If so then can anyone please suggest me a name of a suitable forum?