That's a Lot of Ink

Duncan Hull at O'Really? contemplates the number of scientific journal articles that have been published over the last 350 years. PubMed, the blogger notes, has more than 19 million citations — "around one paper per minute is added to this database (on average)," he adds. "But even this enormous database excludes large swathes of published articles in physics, mathematics, chemistry, engineering and computer science not deemed 'worthy' of indexing by the United States National Library of Medicine," Hull writes.

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