Climate change Intelligent Design Philosophy Science

Sabine Hossenfelder says predictions are overrated; Rob Sheldon responds

Sheldon: … ironically, most of Sabine’s blogs are about the poor predictive power in particle theory, but in this blog she feels she has to reverse herself to defend the good name of global warming. My advice to her is to stick with what she has first-hand knowledge of, because 2nd-hand knowledge always suffers from authoritarian bias.

Cosmology Intelligent Design Physics

Rob Sheldon on dark energy: Does it exist?

Sheldon, our physics color commentator, writes to say, “I’ve mentioned before that Subir Sarkar at Oxford has questioned the existence of “dark energy” and by implication, the award of the 2011 Nobel prize. Sabine Hossenfelder’s blog links to a 7 minute summary of the Nobel prize and Sarkar’s work: But even more compelling is her Read More…

Cosmology Intelligent Design Physics

Sabine Hossenfelder asks: Does nature have a minimal length? Could it point to a final theory?

Hossenfelder: What does this all mean? Well, it means that we might be close to finding a final theory, one that describes nature at its most fundamental level and there is nothing more beyond that. That is possible, but. Remember that the arguments for the existence of a minimal length rest on extrapolating 16 orders magnitude below the distances what we have tested so far. That’s a lot. That extrapolation might just be wrong.