Earlier this year, the scientific journal PLoS ONE published their 10,000th article. Ten thousand articles is a lot of papers especially when you consider that PLoS ONE only started publishing four short years ago in 2006. But scientists have been publishing in journals for at least 350 years  so it might make you wonder, how many articles have been published in scientific and learned journals since time began?
If we look at PubMed Central, a full-text archive of journals freely available to all - PubMedCentral currently holds over 1.7 million articles. But these articles are only a tiny fraction of the total literature – since a lot of the rest is locked up behind publishers paywalls and is inaccessible to many people. (more…)