Karen Bass, Series Producer for "Nature s Great Events," is a TV producer and filmmaker whose award-winning works include "Wild Caribbean," "Andes to Amazon," "Jungle," "Pygmy Chimp, " and episodes of" Natural World "and "Wildlife on One."Brian Leith, Executive Producer for "Nature s Great Events," has been a producer and director for over twenty years in natural history filmmaking and is the author of "The Descent of Darwin.""