Wrong buddy . National Geographic Channel is airing lot of fresh and new content...not only new shows r being added to schedule on constant basis but so r new season of a long running shows. History TV18 is airing lot of repetitive content since last few years.
Discovery Science has been airing wide variety of old + new shows since last few years and is a very good channel to watch.
Discovery Channel again has been airing few new/fresh shows but its schedule is mostly filled with Bear Gryll shows and other such regular shows which have been airing for a very long time which includes re-run as well as new season / episodes.
Still i do not find current line of National Geographic Channel, Discovery Channel, History TV18 to be interesting or likable. Miss science, investigation, biography, exploration shows on National Geographic Channel which once formed part of its core programming strategy. Discovery Channel too until 2016 aired wide range of content and same is the case with History TV18 but now these air content which is repetitive and boring.
Sony BBC Earth , Fox Life, TLC r good channels but latter too need to add more travel shows to its schedule. Travel XP is a good channel but presentation style pf its shows is very unattractive.
These channels need to also offer some exclusive / differentiated content on its HD feed rather than simulcasting all the content available on their SD feed