![](http://static.ddmcdn.com/gif/recipes/unique-kangaroo-group-150721-200.jpg)
The discovery of a genetically distinct group of kangaroos
sheds light on how they survived aeons of climate-induced changes to
their grassland home.
![](http://static.ddmcdn.com/gif/recipes/rhino-cam-150720-200.jpg)
Officials hope the new system will put a serious dent in the number of killings of the endangered animals.
![](http://static.ddmcdn.com/gif/recipes/deep-diving-dolphins-200x200-150720.jpg)
When dolphins dive deep below the water's surface, they avoid
decompression sickness likely because the massive sea creatures have
collapsible lungs.
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