You can use the wayback machine to get old versions and diff the two raw html files (little bit dirty, but it works). Only found changes in the wording of the "description" and "og:description" meta tags.

<meta name="description" content="The insect is so large — as big as a human hand — it's been dubbed a &quot;tree lobster.&quot; [-It was thought to be-]{+Presumed+} extinct,[-but-] some enterprising ento mologists [-scoured-]{+found them on+} a barren hunk of rock in the middle of the [-ocean and found surviving Lord Howe Island stick insects."-]{+ocean."+} />

Edit: Is there a way to get the raw html from archive.org without the rewritten links? It pollutes the diff badly.

I meant something automated like google translate in chrome ;)

but yeah I see your point, still you have the issue of no older archives existing