Cassini recently celebrated a decade in orbit around Saturn. We have learned more about the complex ring structure and many moons of the ringed gas giant than ever expected.
Keep up the great work Cassini! Be on the lookout for more detailed information on these photos as well as the individual moons.
The Wallace-Bolyai-Gerwien theorem shows that any two polygons with equal area must admit a dissection into finitely many pieces where one is allowed to arbitrarily rotate and translate the pieces to go from one polygon to the other. The problem about whether a hinged dissection exists remained open until 2007. You can read the paper here, which presents a method which always works to find a hinged dissection.”