![First polar bear born in the tropics dies at 27 in Singapore zoo (1/5)](http://www.ecns.cn/hd/2018/04/26/03565c50aaf6497c99c8912e5da40667.jpg)
Inuka, the first polar bear born in the tropics, is put down at the Singapore Zoo on April 25, 2018, after a rapid decline in health. Inuka, a 27-year-old animal who grappled with challenges ranging from arthritis to dental problems and ear infections, carried until his last days a green tinge in his fur blamed on algae growth. (Photo/Agencies)