![](http://www.ecns.cn/hd/2020/02/28/7722c0b6010c4aeca4576c8dc8ad4e4a.jpg)
A polar bear cub comes outside for the first time in the Copenhagen Zoo, Denmark, Feb. 27, 2020. (Photo/IC)
![](http://www.ecns.cn/hd/2020/02/28/86efe19f1a3849dd9a43f6d6f53aecbe.jpg)
A polar bear cub comes outside for the first time in the Copenhagen Zoo, Denmark, Feb. 27, 2020. (Photo/IC)
![](http://www.ecns.cn/hd/2020/02/28/e568f784cf6446b0b6765df1e5cfb511.jpg)
A polar bear cub comes outside for the first time in the Copenhagen Zoo, Denmark, Feb. 27, 2020. (Photo/IC)