This Tracker Torpedo Keeps Social Tabs on Sand Tiger Sharks

Sand Tiger sharks have been patrolling coastal waters worldwide for more than 250,000 years. But with only a pair of pups born every few years, this placid apex predator is succumbing to human pressures. Part of the problem is that we still know virtually nothing about their habits—we can't help them if we don't… » 10/24/12 11:30am 10/24/12 11:30am