But what does Plottl mean?

Somehow, this December Backreaction has managed to post on a staggering amount of SCIENCE with their "A Plottl A Day" advent calendar thing, wherein they choose a meaningful graph and then explain the importance of the result it depicts. They've been pretty intense so far. Since they just did some cosmology and some neutrinos, it was about time to shamelessly link to them.

That picture on the right is a plot of the measured neutrino mixing angle vs. the mass-squared from all the neutrino mixing experiments that measured neutrino mixing. It's excellent because it looks so fake.