The actual title of the study is Global and regional reference curves for pain across the lifespan in 6.1 million individuals in 118 countries.

Which makes sense, given its contents. The study is fine. The Guardian’s article’s title is unscientific sensationalist trash, imho.

What’s there to lay out, other than what anyone can read from the Wikipedia entries?

The Internet is a specific global network of computer nodes that use some version of the Internet Protocol to communicate with each other. There are many different services over on it. The WWW is simply one such service.

Finally someone who at least knows the difference between the WWW and the Internet…