Interesting talk, thank you. Some lay questions:<br>Greene: Could Dark Energy be the accumulation of Big Bang and other "small gravitational" ripples? Think tablecloth edges straigtening-out since friction at edges is much lessend (a possible straightening of the space-time fabric ? )<br>Lex: Please consider a future talk with 2021 Nobel Laurate in physics Giorgio Parisi.<br>Knows english well - well liked by students at Syracuse U. Could his mathematical 0 dimension be inside black wholes? Interested in Machine Learning.,(reply>), Only aiming to stimulate conversations (imperative questions only -- need no reply)