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Learn about the greatest minds in western thought!FEATURES • Challenging Quiz Game! • Hi-resolution images! • Detailed information! • Retina Ready Gra …

The tanks of today are powerful, fast, and extremely deadly. Learn about some of the best examples with this app.FEATURES • Challenging Quiz Game! • H …

Learn about some of the strangest and most interesting insects in the world!FEATURES • Challenging Quiz Game! • Hi-resolution images! • Detailed infor …

This app has a collection of beautiful and deadly venomous snakes from around the world!FEATURES • Challenging Quiz Game! • Hi-resolution images! • De …

Hold an entire gem collection in your pocket with this great geology app! Whether you are interested in earth sciences, or precious minerals, this is …

Learn about the work of the famed Dutch master Vermeer!FEATURES • Challenging Quiz Game! • Hi-resolution images! • Detailed information! • Retina Read …

Learn about these advanced weapons of war, used by the most powerful countries in the world.FEATURES • Challenging Quiz Game! • Hi-resolution images! …

Learn about the beautiful and exotic tropical fish of Hawaii! FEATURES • Challenging Quiz Game! • Hi-resolution images! • Detailed information! • Reti …

Learn about these incredible iconic North American landmarks, visited by millions every year!FEATURES • Challenging Quiz Game! • Hi-resolution images! …

Learn about the illustrious Spanish Kings, who shaped the course of history not only for Spain, but for the entire world!FEATURES • Challenging Quiz G …