Lions kill livestock, so Maasai people hunt lions. Can the cycle end?

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 hunt them－often, to avenge cattle that the big cats had eaten.

But as Petro explains, the problem now is that there are too few lions, not too many. "It will be shameful if we kill them all," he says. "It will be a big loss if our future generations can't see lions."