SharkFest

Hundreds of great white sharks have appeared on the doorstep of one of America's most popular tourist destination and began hunting in ways that had never been observed before. A group of scientists is researching this unusual phenomena.

Whether dolphins or whales will purposefully defend a person from a shark attack is a topic of debate among scientists. But those who have experienced these terrible experiences don't question what actually happened.

Experts Greg Skomal, Heather Bowlby, Megan Winton, and Warren Joyce look into what motivates white sharks to travel to the northernmost edge of their range following the first probable white shark attack in Canada in more than 150 years.