In a sense, they're two separate strands of actin that intertwine together, similar to a braided rope or a twisty tie. There are two completely separate strands that twist together to form a thicker, larger strand. As stated before, microfilaments made of actin, which is the most abundant protein in a cell. According to the National Center for Biotechnology Information, actin is the most prevalent in protein-to-protein interactions.
On November 2, 2009, a Canadian version of Nickelodeon was launched, in partnership between Viacom and Corus Entertainment (owners of YTV, which for years has aired and will continue to air Nickelodeon's series); as a result, versions of Nickelodeon now exist in most of North America.
Pinwheel (1977-1979) Nickelodeon was originally launched as Pinwheel on December 1, 1977 and was a local station on Warner Cable's Qube station that ran for 6 hours a day. Shows included Video Comicbook, Pop Clips, and Pinwheel. Pinwheel went national in 1979 thus Nickelodeon has declared that 1979 is the network's official launch year.