Koala shows it's cool to be a tree hugger

Australia's cuddly koala rarely drinks water and doesn't have any sweat glands, long leaving scientists to wonder how it cools off in a heatwave.

Thick smoke chokes Brazil's north as Amazon fires rage

Blackened tree trunks lay smoldering on the charred ground as thick smoke chokes the Amazon rainforest in Brazil, a scene of devastation that is being repeated across the "lungs of the planet."

8 in 10 lizards could be at risk due to deforestation

In Colorado, people flock to the Rocky Mountains when the summer heat gets unbearable. Animals seek shelter too when temperatures become extreme, and forests serve as critical sanctuaries for small tree-dwelling animals like ...

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