We know that Einstein's General Relativity can't be quite right

Sabine Hossenfelder and her weblog have been featured on Hacker News before.

https://backreaction.blogspot.com/

https://news.ycombinator.com/item?id=15464576

https://news.ycombinator.com/item?id=19123099

https://news.ycombinator.com/item?id=21802674

https://news.ycombinator.com/item?id=22033864

https://news.ycombinator.com/item?id=24374602

https://news.ycombinator.com/item?id=24866927

https://news.ycombinator.com/item?id=25140588

https://news.ycombinator.com/item?id=25229677

And she's well-vetted: https://scottlocklin.wordpress.com/2021/05/16/sabine-hossenf...