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 ...

Dogs' sniffing skills may soon get a boost, thanks to a groundbreaking discovery by animal behavior experts in the United Kingdom. Since detection dogs use their exceptional sense of smell to sniff ...

SIOUX CITY — In order to start his mold detection business, Dylan Grimsley needed a dog. Not just any dog, but one that was energetic, curious and ready to put its nose to work. He looked into a few ...