International Team Determines Geographic Origin of Leprosy
...all region of East Africa and Central Asia, is the rarest and oldest, the scientists believe. Type 1, present in Asia and the Pacific region, represents the eastward migration of leprosy, while type 3, seen in Europe, North Africa and the Americas, is the form that migrated west. The most recently evolved, ...A human taste for rarity spells disaster for endangered species
... And as long as someone will pay any price for the rarest of the rare, market price will cover (and exceed) the cost of harvesting the last giant parrot, tegu lizard, or lady's slipper orchid on Earth. The authors describe multiple human activities that could precipitate the anthropogenic Allee effect. H...Survival of the rarest: Fruit flies shed light on the evolution of behavior
...d best had a version of the foraging gene that was rarest in a particular population. For example, rovers did better when there were lots of sitters, and sitters did better when there were more rovers. "If you're a rover surrounded by many sitters, then the sitters are going to use up that patch and you'...