large-scale asymmetric shock front and a layer of hot expanding plumes behind it. The physical scale is roughly $600 \times
  400\,\mathrm{km}$.[]{data-label="fig:full3d"}](f2.png){width="\columnwidth"}

Since neutrinos dominate the energy transport through the supernova, they might quite naturally have something to do with the explosion mechanism. The *neutrino mechanism*, in its current form, was proposed by Bethe & Wilson [@bethewilson:85]. In this mechanism, a fraction ($\sim$$5\%$) of the outgoing electron neutrinos and antineutrinos is absorbed in a layer between protoneutron star and the stalled shock. In the simplest picture, this neutrino *heating* increases the thermal pressure behind the stalled shock. Consequently, the dynamical pressure balance at the accretion shock is violated and a runaway explosion is launched.

The neutrino mechanism fails in spherical symmetry (1D, e.g., [@janka:12a]), but is very promising in multiple dimensions (axisymmetry \[2D\], 3D). This is due largely to multi-D hydrodynamic instabilities that break spherical symmetry (see Figure \[fig:full3d\] for an example), increase the neutrino mechanism’s efficiency, and facilitate explosion. I will discuss this in more detail later in this article. The neutrino mechanism is presently favored as the mechanism driving most core-collapse supernova explosions (see [@janka:12a] for a recent review).

![Volume rendering of the specific entropy in the core of 