Tweak says, "grey generator????"
https://www.newscientist.com/article/2119323-giant-flying-reptile-was-top-predator-like-a-winged-t-rex/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=news&campaign_id=RSS%7CNSNS-news
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