What is it that makes films about sharks so popular?
Sexual organs similar to what we see in sharks and rays today appeared many millions of years ago in much more primitive ancient fishes than was previously thought.
Monster movies are currently rampaging across the globe. Their popularity shows us how Hollywood's place in world cinema is changing.
From Dundee to Dublin, horror spectaculars are springing up like zombies from the dead.
Next time you bite down on something you're eating, spare a thought for the evolutioniary leap made by an ancient fish that gave rise to our jaws.
40 years ago, Steven Spielberg's shark attack classic wowed cinemagoers and ushered in the modern blockbuster. It also helped create a climate from which horror has yet to recover.