Physics Checker reviews unsettled physics concepts and attempts to reconcile majority and minority conclusions against available experimental outcomes.
See "Unsettled Physics".
"I know that most men — not only those considered clever, but even those who are very clever and capable of understanding most difficult scientific, mathematical, or philosophic, problems — can seldom discern even the simplest and most obvious truth if it be such as obliges them to admit the falsity of conclusions they have formed, perhaps with much difficulty — conclusions of which they are proud, which they have taught to others, and on which they have built their lives.". - Leo Tolstoy, Author, War and Peace.
The section "Speculative Theories" contains more speculative, relatively un-vetted conjecture designed to encourage further thought.