5 years after HL Tau: What have we learnt?

I review our attempts over the last 5 years to understand resolved imaging of protoplanetary discs using 3D dust-gas hydrodynamics. Since our initial work explaining HL Tau in Dipierro+2015 we have worked to bring simulations and observations ever closer. One of the most exciting outcomes has been finding direct evidence for embedded planets, helping to solve some of the argument about what causes rings and gaps. I will also discuss our attempts to model most of the large-cavity transitional discs in an attempt to explain their nature.

Contributed talk for the (virtual) conference "Five years after HL Tau: a new era in planet formation"