[–] 22 points 1 year ago (4 children)

In case you are interested, facebook now opens links in a site of thier's, but it contains an embedded window of the site you were linked to. This means that facebook can follow any other links you follow while on that site. It has the site effect of you not visiting that site but instead facebook's "hidden window" shows in the history.

It has no practical reason to exist other than allowing them to gather more data.

Some mobile browsers might have an add-in to auto-break you out of the window.

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  • They were probably made in a slightly dried mud, then sand or other light particles were blown over. Over time this was compacted and the mud became harder than the sand. They are probably still not so hard that you wouldn't have to be careful to reveal them.

    There have been some trackways found from dinosaurs, so they can last even longer.

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