From Wikipedia, the free encyclopedia Martin William Kratt (born December 23, 1965) is an American zoologist and educational nature show host. A grandson of musical-instrument manufacturer William Jacob Kratt, Sr., he and his younger brother Chris grew up in Warren Township, New Jersey, and together created the children's television series Kratts' Creatures and Zoboomafoo, as well as Be the Creature, which runs on the National Geographic Channel and Knowledge Network. They are the main characte ...