Today , his research focus has changed . Professor Neil Hammerschlag has been studying sharks for 10 years . Now , his research is focusing on the effects of the oil spill . Hammerschlag and his team catch sharks , then spray them with oil . It 's still unclear if the sharks are from the oil spill .
Professor Neil Hammerschlag has been studying sharks for 10 years . Now , his research is focusing on the effects of the oil spill . Hammerschlag and his team catch sharks , then spray them with oil . It 's still unclear if the sharks are from the oil spill .