Stream now with KPBS Passport on KPBS+. Watch Wednesdays, June 3 and June 10 at 8 p.m. on KPBS TV + Sunday, June 7 at 3 p.m. and Sunday, June 14 at 3:30 p.m. on KPBS TV. The relationship between man and his noble steed is almost as old as civilization itself, allowing our species to explore, conquer and flourish side by side with the horse. NATURE traces this revolutionizing partnership with anthropologist Niobe Thompson in this two-part series.