international networks international networks generated revenues of $ 1637 million during 2012 , which represented 37% ( 37 % ) of our total consolidated revenues .our international networks segment principally consists of national and pan-regional television networks .this segment generates revenue from operations in virtually every pay-television market in the world through an infrastructure that includes operational centers in london , singapore and miami .discovery channel , animal planet and tlc lead the international networks 2019 portfolio of television networks .international networks has one of the largest international distribution platforms of networks with as many as fourteen networks in more than 200 countries and territories around the world .at december 31 , 2012 , international networks operated over 180 unique distribution feeds in over 40 languages with channel feeds customized according to language needs and advertising sales opportunities .international networks also has free-to-air networks in the u.k. , germany , italy and spain and continues to pursue international expansion .our international networks segment owns and operates the following television networks which reached the following number of subscribers as of december 31 , 2012 : global networks international subscribers ( millions ) regional networks international subscribers ( millions ) .
[['global networks discovery channel', 'internationalsubscribers ( millions ) 246', 'regional networks dmax', 'internationalsubscribers ( millions ) 90'], ['animal planet', '183', 'discovery kids', '61'], ['tlc real time and travel & living', '174', 'quest', '26'], ['discovery science', '75', 'discovery history', '13'], ['investigation discovery', '63', 'shed', '12'], ['discovery home & health', '57', 'discovery en espanol ( u.s. )', '5'], ['turbo', '42', 'discovery familia ( u.s )', '4'], ['discovery world', '27', '', '']]
on december 21 , 2012 , our international networks segment acquired 20% ( 20 % ) equity ownership interests in eurosport , a european sports satellite and cable network , and a portfolio of pay television networks from tf1 , a french media company , for $ 264 million , including transaction costs .we have a call right that enables us to purchase a controlling interest in eurosport starting december 2014 and for one year thereafter .if we exercise our call right , tf1 will have the right to put its remaining interest to us for one year thereafter .the arrangement is intended to increase the growth of eurosport , which focuses on niche but regionally popular sports such as tennis , skiing , cycling and skating , and enhance our pay television offerings in france .on december 28 , 2012 , we acquired switchover media , a group of five italian television channels with children's and entertainment programming .( see note 3 to the accompanying consolidated financial statements. ) education education generated revenues of $ 105 million during 2012 , which represented 2% ( 2 % ) of our total consolidated revenues .education is comprised of curriculum-based product and service offerings .this segment generates revenues primarily from subscriptions charged to k-12 schools for access to an online suite of curriculum-based vod tools , professional development services , digital textbooks and , to a lesser extent , student assessments and publication of hardcopy curriculum-based content .our education business also participates in global brand and content licensing and engages in partnerships with leading non-profits , corporations , foundations and trade associations .content development our content development strategy is designed to increase viewership , maintain innovation and quality leadership , and provide value for our network distributors and advertising customers .our content is sourced from a wide range of third-party producers , which include some of the world 2019s leading nonfiction production companies as well as independent producers .our production arrangements fall into three categories : produced , coproduced and licensed .substantially all produced content includes content that we engage third parties to develop and produce , while we retain editorial control and own most or all of the rights , in exchange for paying all development and production costs .coproduced content refers to program rights that we have collaborated with third parties to finance and develop because at times world-wide rights are not available for acquisition or we save costs by collaborating with third parties .licensed content is comprised of films or series that have been previously produced by third parties. .

Question: what is the difference in millions of international subscribers between discovery channel and animal planet?
Answer: 63
Explanation: keep track of this differential over time can point out strengths and weakness .