LOIBOR SIRET, Tanzania — Saitoti Petro, a tall, slender 29-year-old, is marching with four other young men who belong to a pastoralist people called the Maasai. Beneath the folds of his thick cloak, he carries a sharpened machete. Only a few years ago, men of Petro’s age would most likely have been stalking lions to … Continue reading Lions kill cattle, so people kill lions. Can the cycle end?