Any sufficiently advanced technology is indistinguishable from magic.

Open the pod bay doors now.

In the 1990s there were fierce battles.

From the East Coast to the West Coast,

featuring renowned physicists like Dr.

Dre.

And he was battling, Biggie Smalls, Tupac, Naus and the Wu-Tang Clan.

Well, would it surprise you to know that there are battles in physics every bit as heated,

although hopefully not as bloody as those battles that plagued the rap scene of the 1990s?

Today I'm doing a reaction video to another reaction video. How about

that for Meta? If you're new here, I'm Brian Keating, the Chancellor Distinguished Professor

of Physics at UC San Diego. I'm also an experimental cosmologist for decades.

Been involved with some of the biggest and best experiments of all time in this field.

Bicep, Bicep II, Simon's Array, Simon's Observatory, and many, many more.

I speak today as an experimentalist to my two friends, Carlo Raveli and Sabina Hassenfelder.

As I said, I'll be reacting to a reaction, but that reaction was provoked by an original

video that I made that depicted Loop Quantum Gravity. but that

depicted loop quantum gravity as possibly suffering a fatal blow

thanks to new data from an experiment coming out of China.

Talk about East versus West. That video was about loop quantum gravity and the so-called appearance of Lorentz invariance violation that seems to occur within certain models of it. There was a paper published by a Chinese team operating the Lasso Experiment.

I contacted the paper author about the Lorentz invariance in violation effects and reported in his team's paper, I asked him specifically, does this mean that certain

models of loop quantum gravity are dead? He replied, yes, linear loop quantum gravity models are dead.

...