(Photo: Flikr/Gaudencio Garcinuno)
Tonight goblins will lurk, witches will brew and scary movies will play.

But it’s not just werewolves and vampires that are getting people’s attention.

Humans are also worried about food additives and online stalkers.

So, why do some people love to get freaked out? And, why are others worry warts? Ryan Warner talks to biochemist Bridget Coughlin about the science of fear.