From MK-Ultra's mind-control research to the CIA's Acoustic Kitty project that turned a cat into a listening device, these secret operations are almost too shocking to believe.
From Machu Picchu to Quiriguá, these historic explorations in the late 1800s and early 1900s revealed the magnificent ruins that were hidden under jungle vegetation.
The fascist founder of the terrorist organization Ustaše, Ante Pavelić was responsible for the deaths of almost one million people during World War II.
Known as Hypsignathus monstrosus, the hammer-headed bat is a fruit-eating megabat found in Equatorial Africa and some say it's the world's ugliest animal.