Two six-week-old baby tigers wait to be vaccinated for the first time at a Zoo in Leipzig, Germany, 11 April 2017. The vaccinations are repeated 3 to 4 times before they turn one. The pair each weigh about 6 kg and their mother weighs 350 kg. The Zoo is in the process of naming them. (Photo by Jan Woitas/Picture-alliance/DPA/AP Images)
