HomepageCATHEPopular puzzles created by CATHE Popular puzzles created by CATHE 6SOIL COMPOSITIONCATHEsolved 1,206 timesSolve puzzle 80BIODIVERSITYCATHEsolved 788 timesSolve puzzle35UNIVERSE FOR CHILDRENCATHEsolved 316 timesSolve puzzle36TRIP TO THE MOONCATHEsolved 302 timesSolve puzzle50MagnetizationCATHEsolved 230 timesSolve puzzle54CARBON CYCLECATHEsolved 163 timesSolve puzzle35DISCOVERING THE UNIVERSECATHEsolved 142 timesSolve puzzle 72Prokaryotic cellCATHEsolved 135 timesSolve puzzle88MAN AND PLANETCATHEsolved 124 timesSolve puzzle63PHOTOSYNTHESISCATHEsolved 118 timesSolve puzzle81What came firstCATHEsolved 110 timesSolve puzzle60natural resourcesCATHEsolved 103 timesSolve puzzle48BIRCH MOTH ADAPTATIONCATHEsolved 100 timesSolve puzzle60WATER CYCLECATHEsolved 77 timesSolve puzzle45LET'S TAKE CARE OF WATERCATHEsolved 66 timesSolve puzzle66DIGESTIVE SYSTEMCATHEsolved 58 timesSolve puzzle56THIRD CLIMATECATHEsolved 53 timesSolve puzzle88SPORANGIUMCATHEsolved 42 timesSolve puzzle77OIL EXTRACTIONCATHEsolved 41 timesSolve puzzle