Nature World News: Shark sightings have been increasing along the East Coast in the past few decades. The rise of the sightings as documented by Discovery Channel's annual Shark Week, isn't due to the increase in its population but because of people trying to get too close to them, experts say. George Burgess, a Florida researcher and curator of the International Shark Attack File told USA Today, that people are spending more time in the water now than they did a few decades back. "More people are entering the sea...