"TAPACHULA, Mexico – Most people wouldn’t dare step off the trail and climb several feet down a steep ravine covered in thick foliage – excellent cover for the poisonous snakes common here in the mountains of southern Mexico. But it doesn’t seem to bother Beatriz Otero-Jimenez. Wearing tall rubber boots, she fearlessly wades into the weeds to do something that many would find just as terrifying or repulsive: catching rats and mice."