Anyone who has gone to the drug store knows that the labels on sunscreens can be confusing. The sun protection factor, or SPF, numbers are all over the place. Some say "sunblock"; others says "sunscreen." What's the difference between "waterproof" and "water-resistant?"
Alaska Natives are twice as likely to get colon cancer and die from it as the white population in the United States. When Mayo Clinic doctor David Ahlquist took a trip to Bethel, Alaska, in the mid-1990s, that startling statistic caught his attention.
"Here they had one of the world's highest rates of colon cancer and one of the world's poorest outcomes in terms of survival from cancer, because of late diagnosis," Ahlquist says.