Newborn white rhino Silverio takes his first giant steps in a Chilean zoo in a boost to his species

Hannah, a 13-year-old white rhinoceros, has delivered a newborn calf in a rare zoo birth for the almost endangered species. Hannah, a 13-year-old white rhinoceros, has delivered a newborn calf in a rare zoo birth for the almost endangered species. Plants & Animals Ecology Phys.org – latest science and technology news stories