I'd like to point out that the first author, Stephanie Seneff, "began publishing controversial papers in low-impact, open access journals on biology and medical topics" with "heated objections from experts in almost every field she's delved into" [1], and that the second author's "Naturopathic Physician" degree is not a very good indicative for experience conducting Immunology (or) medical research.
It's unnerving how everything is open at my city as well - except public universities. Some teachers have taken education for recording all their classes and pressing "Send" at the comfort of their home, I guess.
It can also subsist on top of ketone bodies - if fat breakdown is high enough due to a lack of glucose due to fasting or lack of other storage such as glycogen.
These comments about Twitter are really getting tiring. See any Foone thread and you'll almost always realize it's getting derailed by a huge comment thread complaining about Twitter.
PhotoDNA: "is an image-identification technology used for detecting child pornography and other illegal content which is reported to the National Center for Missing & Exploited Children (NCMEC) [...] It is used on Microsoft's own services including Bing and OneDrive, as well as by Google's Gmail, Twitter, Facebook, Adobe Systems, Reddit, Discord and the NCMEC, to whom Microsoft donated the technology." [1]
I'm (almost) certain any Google service will tag CSAM for reports and will also hash content it deems illegal for the NCMEC too [2], so I wouldn't be surprised if Google Photos already did something like this.