Letters from the April 23, 2005, issue of Science News | Science News

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Letters to the Editor

Letters from the April 23, 2005, issue of Science News

2:49pm, April 20, 2005

The shark as red herring

I'm sure you published "A Fishy Therapy," (SN: 3/5/05, p. 154) in good faith, but I believe that claims for shark cartilage are not made seriously by anyone who studies the role of natural substances in cancer prevention. It was proved ineffective long ago. I think your article does a disservice to honest people who are trying to fight the drug-industry prejudice against natural (profitless) substances to prevent and treat many diseases. Shark cartilage is a red herring.

James Street
Oakland, Calif.

On the bubbles

The article "Brutal Bubbles: Collapsing orbs rip apart atoms," (SN: 3/5/05, p. 147) didn't specify how strong the ultrasonic waves were or if any special conditions were required for these bubbles to form. I am curious to know if there's a difference between the ultrasonic waves mentioned in your article and those in ultras

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