Takes you on a tour of some of history's most famous female BFFs .. Spanning art, science, politics, activism, and even sports, these girl squads show just how essential female friendship has been throughout history and throughout the world.

The Haenyeo -- Shirley and Sharon Firth -- The 1964 Japanese women's Olympic volleyball team -- Madison Keys and Sloane Stephens -- Trung Trac and Trung Nhi -- Manon Roland and Sophie Grandchamp -- The Patriotic Women's League of Iran -- Ruth Bader Ginsburg, Sonia Sotomayor, and Elena Kagen -- The Dahomey Amazons -- Anne Bonny and Mary Read -- The Red Lanterns shining -- The Red Women of Finland -- Anandibai Joshi, Sabat Islambooly, and Kei Okami -- The Edinburgh Seven -- The women scientists of Antarctica -- The West Area computers -- The Trobairitz -- The Blue Stocking Society -- Salome Urena and the Instituto de Senoritas -- The Zohra Orchestra.