The death of Nola the northern white rhino

ah Zhang Science

Nola the Northern White Rhino’s Death Leaves Just Three on Earth

In this Dec. 31, 2014, file photo, Nola, a 40-year-old northern white rhino who is only one of five remaining of the species, wanders around her enclosure at the San Diego Zoo Safari Park on a cold winter day in Escondido, Calif. Six female southern white rhinos arrived on a chartered MD11 flight from South Africa landed at the San Diego International Airport on Thursday, Nov. 5, 2015.  San Diego Zoo Global has one of the most successful rhino breeding programs in the world. To date, a total of 94 southern white rhinos, 68 greater one-horned rhinos and 14 black rhinos have been born at the San Diego Zoo Safari Park. (AP Photo/Lenny Ignelzi, File)
 

Nola. Lenny Ignelzi/AP

Animals dying peacefully of old age is rarely newsworthy, but the death of Nola the northern white rhino at the San Diego Zoo on Sunday made international headlines. Nola was one of only four northern white rhinos left on Earth; her death is a real-time window on extinction. Read more.