Page 2 of 2 It's a Wonderful World! Now try these slightly stranger questions... 6. The deepest cave in the world is in...     France     Austria     Georgia     Spain 7. The most common element in the universe is...     Carbon     Oxygen     Hydrogen     Helium 8. The deadliest snake in the world is the...     Taipan     Cobra     Black mamba     Viper 9. The animal with the heaviest brain is the...     Elephant     Hippopotamus     Sperm whale     Bottle-nosed dolphin 10. The world's heaviest turtle is the...     Green sea turtle     Pacific leatherback turtle     Loggerhead turtle     Touche turtle   < Advanced Quizzes  |  Try Again  |  Quizzes Home  |  Next Quiz >   Facts: The Top 10 of Everything 2003, by Russell Ash