That's actually a Wikipedia thing, by puttingĀ 

<a rel="nofollow" class="external text"

in the article source code. Internal articles in contrast say

><a href="" class="internal"



That's not a Google good will thing.

Sincerely,
Laura Hale

On Fri, Feb 6, 2015 at 9:44 PM, Kerry Raymond <kerry.raymond@gmail.com> wrote:
I thought that Wikipedia addressed the SEO problem by getting Google to not
follow the off-wiki links when crawling, so that Wikipedia's page rank would
not follow through to off-Wikipedia links. But I cannot (using Google) find
the page where I read that.

While that doesn't prevent people from spamming Wikipedia with external
links to catch people's eyeballs while reading Wikipedia, it should address
the SEO problem somewhat.

Kerry



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