Horton soon discovers that the speck is actually a microscopic planet populated by creatures called Whos. The citizens of Who-ville introduce themselves and their yearly Christmas pageant directed by their friend the Grinch. They also reveal that in addition to being unable to control where the speck flies, they are on the brink of war and their entire population of Truffula Trees has been cut down ("Here on Who"). The Whos thank Horton and ask for his protection, and he agrees to guard their planet.