Welcome to Wikipedia

,
6,503,246 articles in English

Brigid Balfour (24 May 1914 – 1 March 1994) was a British scientist who studied cellular morphology and ultrastructure in relation to immune function. She advanced the study of dendritic cells, realising that they were derived from Langerhans cells and played an important role in initiating and promoting immune reactions.

Photograph credit: National Institute for Medical Research; restored by Adam Cuerden

Recently featured:

Other areas of Wikipedia

  • Community portal – The central hub for editors, with resources, links, tasks, and announcements.
  • Village pump – Forum for discussions about Wikipedia itself, including policies and technical issues.
  • Site news – Sources of news about Wikipedia and the broader Wikimedia movement.
  • Teahouse – Ask basic questions about using or editing Wikipedia.
  • Help desk – Ask questions about using or editing Wikipedia.
  • Reference desk – Ask research questions about encyclopedic topics.
  • Content portals – A unique way to navigate the encyclopedia.

Wikipedia's sister projects

Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects:

Wikipedia languages