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 ...

The nose of a dog is marvelous in its smell. Humans possess an average of 5 million scent receptors located in the nose by contrast dogs have up to 300 million, although this may vary with the breed.

Have you ever wished that your dog’s obsession with sniffing things could lead to something productive? You may be in luck! A recent study has shown that regular pet dogs can be trained to sniff out ...

HELSINKI, Finland -- Finland has deployed coronavirus-sniffing dogs at the Nordic country's main international airport in a four-month trial of an alternative testing method that could become a ...