Shark Cartilage May Contain Toxin

Shark cartilage, hyped as a cancer preventive and joint-health supplement, may contain a neurotoxin that has been linked with Alzheimer’s and Lou Gehrig’s disease, a new study suggests.

Airport Scanners Are Safe, Government Says

A report from the Homeland Security Department is urging the public not to worry about the safety of full-body X-ray machines at airports, saying a person would have to pass through one dozens of times a day for a year before reaching annual radiation limits.