You can't blame beachgoers on Cape Cod for being jittery after a spate of recent shark sightings, some just a bit too close for comfort but all part of a natural ecosystem that scientists say humans must accept. On Thursday, shark sightings prompted the closure of Race Point Beach in Provincetown to swimming for about two hours. "White sharks prey on seals. White sharks, often called great whites, were around millions of years before humans, but only recently have the fearsome creatures been catalogued in large numbers off Cape Cod during the summer. "We had people who were surfing, we had swimmers, and we had a shark attack a seal among them all," he said.

Source: ABC News August 28, 2017 04:26 UTC