Sharks have an excellent sense of smell, but bleeding from a mile away isn't exactly enough to trigger bloodlust.

Sharks have long been feared, and one of the main reasons is because we often think of them as being dangerous and bloodthirsty killers. Films such as Jaws are not exactly great marketing for sharks.

Add Yahoo as a preferred source to see more of our stories on Google. Sharks are often said to be able to smell blood from miles away, but how true is that claim? While their sense of smell is ...