Oh look... a Penguin!! 
Penguin update rolling out

On Friday last week, we started rolling out a Penguin refresh affecting fewer than 1% of queries in US English search results. This refresh helps sites that have already cleaned up the webspam signals discovered in the previous Penguin iteration, and demotes sites with newly-discovered spam. 

It’s a slow worldwide rollout, so you may notice it settling down over the next few weeks.
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