This document discusses biohackathons, which are events where participants collaborate to create new tools or applications in bioscience over a weekend. It provides examples of two biohackathons held in 2014 at Stanford University and University of California San Diego. At these events, around 30 participants formed teams and worked on projects like tools for visualizing and editing bio data or finding similarities between biomedical concepts. The goals were to foster collaborative creativity, learning, and networking. The best projects received small cash prizes.