Planet formation in warped discs.

Despite observing more than 6000 planets around other stars, we still struggle to understand exactly how planets are formed and why they have the properties they have. The answer lies in protoplanetary discs: the dusty, swirling gas discs where planets are born. It is most common to assume that protoplanetary discs have a flat geometry much like a dinner plate. However, observations over the last few years have revealed that more than a third of planet forming discs show warped geometries, where the orientation of the disc changes with distance from the central star. IN some spectacular cases these discs may also be torn or broken from the gravitational interaction with the central stars. In this talk I will explore the origin of warped discs and their consequences for planet formation. I will also introduce our new numerical method, adaptive particle refinement, a new tool to tackle these very problems.