Gravitational Instability and Substructure in Protoplanetary Discs

In the ALMA era of observational astronomy, we are availed of a plethora
of spatially resolved images of protoplanetary discs, the site of
exoplanet formation.
At the earliest stages of the disc lifetime, it is likely that these
objects are very massive, and therefore undergo evolution primarily
driven through gravitational instability. I will talk about what this
means for detections and planet formation from a simulation point of
view, and highlight some recent results and predictions in the field.