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Case file

Geography and cartography in the medieval Islamic world

Wikipedia's first sentence called it “driven by a number of factors”. Today it says “studies of geography and cartography in the muslim world during the islamic golden age”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2025 one. Red dashes: removed from Wikipedia since. Pale dots: rewritten; the numbered note shows what it says now. 1 tap a number or a side note to jump between them
The opening as it read in 2025

Muslim scholars made advances to the map-making traditions of earlier cultures, explorers and merchants learned in their travels across the Old World ( Afro-Eurasia ). Islamic geography had three major fields: exploration and navigation, physical geography , and cartography and mathematical geography . Islamic geography reached its apex with Muhammad al-Idrisi in the 12th century.

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1292361235.
Today
Wikipedia's first sentence called it “driven by a number of factors”. Today it says “studies of geography and cartography in the muslim world during the islamic golden age”. Read the current article and compare.
201020152020Oct '232025
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.

What Wikipedia says this is

Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.

Then

driven by a number of factors

Now

studies of geography and cartography in the muslim world during the islamic golden age

Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.

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