The Nashville Zoo is grieving the unexpected loss of a newborn Masai giraffe.The first-time mother, Nasha, 6, gave birth to a healthy calf on Saturday following a complicated delivery, according to the zoo.But after announcing the birth, zookeepers noticed the calf was in distress. Shortly afterward, they announced the tragic loss.”We are heartbroken to announce that Nasha’s calf died shortly after our birth announcement earlier