The cosmological constant is physics’ most embarrassing problem
&quot;The universe is under no obligation to make sense to you&quot; — Neil DeGrasse Tyson<p>IMO the most embarrassing problem in physics is people pushing non-falsifiable, unscientific theories (multiverse). The fact that some futzing constant needs or doesn&#x27;t need to be added in order to bring a model in line with empirical observation, in comparison, is quite benign.