Visitors of the Higashiyama Zoo and Botanical Gardens in Japan have been concerned after they witnessed polar bears usually white in colour, turned green one day. But zoo official Masami Kurobe told them the bears were not sick. The fact is, the animals were dyed green after swimming in a pool full of algae. High temperature in July and August had promoted the growth of algae in the bear pond. Kurobe added that the bears are expect to turn white again in November when the growth of the autotrophic organism declines.

Source: macon