Some cable channels are kicking off the new year with new seasons and new shows. A veteran staple of the Discovery Channel, “Man vs. Wild” with Bear Grylls, is starting its fifth season. I can’t say that I watch it all that often but what the guy goes through to show viewers how to survive the elements is intriguing and sometimes ridiculous. Thanks to Bear, if I ever find myself stranded in the African Savannah I know I can rehydrate myself with the juices from fresh elephant dung.