and commentaries. In 2005, Biology Letters (originally a supplement to Proceedings B), was launched as an independent journal publishing short articles from across biology. According to Journal Citation Reports, the journal has an impact factor of 5.349. Access policy All articles are available free at the journals' websites after one year for Proceedings B and two years for Proceedings A. Between 11 and 70 years after publication they are behind a paywall, and after that they enter the free digital archive. Authors may have their articles made immediately open access (under Creative Commons license) on payment of an article processing charge. Since January 2023 Proceedings A and Proceedings B are online only. External links Proceedings of the Royal Society A Proceedings of the Royal Society B Archive Highlights of Proceedings A References Publications established in 1800 Royal Society academic journals English-language journals Multidisciplinary scientific journals Monthly journals Biweekly journals Biology journals 1800 establishments in Great Britain