Billy worked with the latter for many years each time attending his seminars in England, France, Holland, and the United States. Thus, Billy accumulated a lot of knowledge and he included that knowledge in his book-Yoga in the Kashmir tradition: The art of listening.
During the COVID-19 pandemic, Wikipedia's coverage of the pandemic and fight against misinformation received international media attention, and brought an increase in Wikipedia readership overall. Noam Cohen wrote in Wired that Wikipedia's effort to combat misinformation related to the pandemic was different from other major websites, opining, \"Unless Twitter, Facebook and the others can learn to address misinformation more effectively, Wikipedia will remain the last best place on the Internet.\" In October 2020, the World Health Organization announced they were freely licensing its infographics and other materials on Wikimedia projects. There were nearly 7,000 COVID-19 related Wikipedia articles across 188 different Wikipedias, as of November 2021.[update]
Wikipedia has spawned several sister projects, which are also wikis run by the Wikimedia Foundation. These other Wikimedia projects include Wiktionary, a dictionary project launched in December 2002, Wikiquote, a collection of quotations created a week after Wikimedia launched, Wikibooks, a collection of collaboratively written free textbooks and annotated texts, Wikimedia Commons, a site devoted to free-knowledge multimedia, Wikinews, for collaborative journalism, and Wikiversity, a project for the creation of free learning materials and the provision of online learning activities. Another sister project of Wikipedia, Wikispecies, is a catalogue of all species, but is not open for public editing. In 2012, Wikivoyage, an editable travel guide, and Wikidata, an editable knowledge base, launched. 1e1e36bf2d