It's like the old saying goes: Nothing is certain in life except for death, taxes and giant monsters rising out of sea.
From director Guillermo del Toro, "Pacific Rim" is an old-fashioned creature feature in which colossal monsters battle titanic robots to determine the fate of all mankind. As the monsters -- collectively called Kaiju -- ravage cities worldwide, scientists deploy 25-story-high robots called Jaegers to defend the population. The film is a tribute to those old Godzilla movies from Japan, with visual effects and creature design from some of the leading artists in the business.
In creating the film's Kaiju monsters, the designers looked to the animal kingdom. Director del Toro instructed his team to draw inspiration from nature's scariest creatures, especially lizards, crustaceans and insects. Of course, the old attack-of-the-giant-monsters premise has been a go-to idea in science fiction movies from as far back as the 1930s. Here we take a look at the history of giant monsters in film, as well as the some of real-world creatures that inspired them.