Wanting a sequel for their 1966 film "One Million Years B.C." (and unable to hire Harryhausen again, who was working on "The Valley of Gwangi" at the time), England's Hammer Films hired Danforth to animate the dinosaurs in "When Dinosaurs Ruled the Earth" (1970). Danforth refined the ability of his dinosaur models to realistically convey emotions, and developed the first use of motion-blurring for the animation of the models by using thin wires to move parts of them during the exposure of each frame. The film earned him a second Oscar nomination for Best Visual Effects, but lost to Disney's "Bedknobs and Broomsticks" (1970).