Welcome to the first BEPUphysics development blog post! Today's post is about broad phases. The BroadPhase (accessible in the Space.BroadPhase property) prunes object collisions based on their axis-aligned bounding boxes. Some also accelerate queries, like ray casts and bounding box tests. In v0.16.0, the main broad phase has been rewritten and a few new options are available. The data in this post was collected on the latest development version, which can always be downloaded on the development fork over on codeplex: http://bepuphysics.codeplex.com/SourceControl/network/Forks/RossNordby/Development