"Mountain of Dinosaurs" (1967) A Russian cartoon, directed by Rasa Strautmane. WARNING: things don't end well for the Dinosaurs. [via]
Pythagasaurus is the fabled Tyrannosaurus practiced in the skills of trigonometry and long division. Apparently he knows all eight numbers. [Via]
"These giant monsters of the past are seen to breathe, to live again, to move and battle as they did at the dawn of life!" The Ghost of Slumber Mountain (1918), by Willis O'Brien. Previously.
Some early test shots from legendary filmmaker and animator Ray Harryhausen's unfinished film, Evolution. [more inside]