A variety of rare blue species--from the blue lobster to the blue black bear--are rare and unique for a reason. Travel across Earth to discover eight species th

Spring, 1990. After years of searching in vain, a stranger passes a scrap of paper to Zina. It’s from Aziz: the man who vanished the day after their wedding a

A key way that behavioral ecologists develop general theories of animal behavior is by studying one species or a closely related group of species--''model syste