Are canines better than cats? A new ban on exercising pets in one Islamic country revives the debate on which animal is the best friend of humankind.
Iran makes it a crime to walk your dog
Dog days: Many pet owners in Iran now walk their dogs in secluded areas at night — or take them for a secret drive. Glossary
Iran - A country in Western Asia, officially called the Islamic Republic of Iran. It has a population of 84 million.
Depressed - Depression is low mood that affects someone's daily life, and can last for weeks or months.
Harvard - A top US university, founded in 1636.