The behavior of the slime mold (if that’s what it is) sounds altogether too modern for Dr. Cohen’s liking. That’s understandable. See, for example, “Is an amoeba smarter than your computer? (yes, in certain respects, it is) The trouble is, many forms of behaviour, like nest-sharing and parental care, have been found earlier than expected. We shall see.
We’ve often heard that there were billions of boring years in the history of life (the Boring Billion). Maybe not so boring.