Gravity goes quantum: really?

Just for fun, I had a session about rather hypeish "How gravity goes quantum" of NASA (see this ) with Google to revive what I remember of the model of Partanen and Tulkki from previous discussions with Tulkki and about the review of their model that I wrote (see blog post ). I also proposed the role of the octonions then and they are indeed introduced in their recent article. The core fields are…