Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet initiative has ...

Spotting a Mojave Desert tortoise is increasingly difficult in the American Southwest. The tortoises, with their unmistakable domed patterned shells, live in California, parts of Nevada, Arizona and ...

The animals are also vulnerable to a range of deadly diseases such as upper respiratory illnesses and the shell disease cutaneous dyskeratosis, which softens their shells. Finally, as climate change ...

(CNN) — Inside a Mojave aster flower, a tiny bee is fast asleep. At night, the pale lavender petals close, providing a safe resting place. In the morning, as birdsong rings out across the desert, the ...

(CNN) — Inside a Mojave aster flower, a tiny bee is fast asleep. At night, the pale lavender petals close, providing a safe resting place. In the morning, as birdsong rings out across the desert, the ...