Should you or shouldn’t you? News about health can be confusing, as our two lead stories this week highlight:

The debate over cancer screenings — their advantages and their risks — flared up this week. On Tuesday, the New York Times reported that the American Cancer Society is about to revise its screening guidelines. The ACS quickly replied that it “stands by its screening guidelines,” which the Times acknowledged in a follow-up article on the limitations of current screening tools. You can find the current guidelines here.

Confused by the conflicting ‘fish are healthy’/'fish are toxic’ reports? The respected non-profit Monterey Bay Aquarium just issued a list of “Super Green” seafood, choices that are good for our hearts and good for our oceans.

We were fascinated by this case study of a rare adult-onset red-meat allergy, apparently developed in response to a tick bite. (Washington Post)

In the ‘not new but still very cool’ category, check out the Nike Livestrong Chalkbot, spraying temporary inspirational messages on the pavement, and the “I Heart Guts” site, explaining internal organs with cute cartoons and fun text (assuming puns like “Spells Like Spleen Spirit” are to your liking).