Letters from the January 13, 2007, issue of Science News | Science News

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Letters to the Editor

Letters from the January 13, 2007, issue of Science News

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3:23am, January 8, 2007

Sunny exposition

"The Antibiotic Vitamin" (SN: 11/11/06, p. 312) reminds me that in preantibiotic days, tuberculosis patients were put on a fresh-air-and-sunshine regimen. Could the vitamin D so acquired account for the cures this system sometimes produced?

Nancy Axford
Sacramento, Calif.

Researcher John J. Cannell points to TB sanitariums as anecdotal evidence that sunlight fights infections.—J. Raloff

Does the vitamin D in milk help protect against infection?

Graeme McRae
Palmdale, Calif.

Probably not, according to Michael Holick of Boston University, who has measured the vitamin's content in milk. Far better, he says, would be cod-liver oil, with "a whopping 1,360 [international units of vitamin D] per tablespoon."—J. Raloff

Animal instincts

The idea of Pleistocene rewilding in North America is

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