Go nose-to-nose with a great white off Baja's Guadalupe Island, where shark sightings are all but guaranteed
"They're smart," says Lawrence Groth, who as proprietor of Great White Adventures is making his 180th trip to the area. "They know we pull the line in to the boat when we see them coming, so they come in from under the boat to take the bait. They're problem solvers. Four hundred million years. They survived the last five extinction periods."