Origins of Dogs Traced
Dogs today come in all shapes and sizes, but scientists believe they evolved from just a handful of wolves tamed by humans living in or near China less than 15,000 years ago. Three research teams have attempted to solve some long-standing puzzles in the evolution and social history of dogs. Their findings, reported in the journal Science, point to the existence of probably three founding females - the so-called "Eves" of the dog world. They conclude that intensive breeding by humans over the last 500 years - not different genetic origins - is responsible for the dramatic differences in appearance among modern dogs.
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Source: BBC |
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Working Like a Dog
Sheepherders, detectives, household helpers, and more—dogs do all sorts of jobs. And they're doggone good workers! Some of the best workers in America don't get paid. But these employees aren't quitting or even complaining. In fact they seem happy to work like, well, dogs. That, of course, is what they are. Professional pooches do a variety of jobs. Dogs serve as "eyes" for the blind and "ears" for the deaf. And they bring joy to nursing home residents. Dogs do many other jobs too. They pull sleds, find crime clues, inspect luggage for illegal drugs or food items, hunt for missing persons, and much more. One lucky dog is even a vice president for a big company!
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Source: National Geographic |
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