News feeds like Facebooks shape how you see the world.

Algorithms behind those sites determine what news is important enough for you to see.

On the surface, the idea of suggesting stories that are relevant to you makes sense.

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Google Now suggests articles they think youll like based on your search history.

you could evenprevent this feature from showing you stories about topics or from news sources you dont like.

After all, why would you want Google recommend garbage from sites you hate?

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Its the primary way most people hear and read the news.

That also gives the social internet a lot of influence over your perceptions.

Earlier this year, we showed you how to find outhow Facebook thinks you lean politically.

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The same thing happens for conservatives and even the most fringe members of the political spectrum.

It even stopped summarizing news stories.

Now, trending news topics are designated simply by the subject of their story.

You cant get it from Facebook itself.

Google does this too.

If you scroll down in Google Now on your smartphone, youll see recommendations for articles to read.

In other words, Google also wants to give you more of what youre already looking for.

While its handy, its certainly privy to biasespecially your own.

It says Rick and Morty, so I get the recommendations.

This also happens when I read political news.

As long as Ive shown interest Google thinks I should read about it.

Likewise, Facebook and Google have a vested interest in showing you the stories you interact with the most.

Dont share it just because it sounds true.

Take a few minutes todo a little research and verify a story before you believe it.

Illustration by Angelica Alzona.