The Human Family Tree – Naked Science – National Geographic Channel

 

 

The Human Family Tree – Naked Science – National Geographic Channel

On the most diverse street in the most diverse city in the most diverse country in the world, a team of National Geographic scientists will swab the cheeks of some 200 random New Yorkers. The goal: to retrace our ancestral footprints and prove we are all cousins in the “family of man.” Join geneticist Spencer Wells and a team of technicians from National Geographics Genographic Project as they trace the human journey through time and space, from our origins in the heart of Africa to the ends of the world. Cutting edge science, coupled with a cast of New Yorkers — each with their own unique genetic history — will help paint a picture of these amazing journeys. Ultimately, The Human Family Tree answers some of humanitys most burning questions, such as who we are and where we come from, and forces us to change how we think not only about our relationships with our neighbors, but ourselves.

Dogs That Changed The World (PBS Nature)

 

Broadcast (2007) NATURE’s two-part special DOGS THAT CHANGED THE WORLD tells the epic story of the wolf’s evolution, how “man’s best friend” changed human society and we in turn have radically transformed dogs. From the tiniest Chihuahua to the powerful and massive English Mastiff, modern domesticated dogs come in a bewildering array of shapes and sizes, with an equally diverse range of temperaments and behaviors. And yet, according to genetics, all dogs evolved from the savage and wild wolf-in a transformation that occurred just 15,000 years ago.
The Rise of the Dog

In THE RISE OF THE DOG, you’ll learn about how the domestication of dogs might have taken place, including the theory of biologist Raymond Coppinger that it was the animals themselves-and human trash-that inspired the transformation. The genetic analysis of Peter Savolainen of the Royal Institute of Technology in Sweden has placed the origins of domesticated dogs-and those of the first dog-in East Asia. You’ll also discover 14 dog breeds that controversial genetic studies show are the most ancient-and the best living representatives of the ancestors to all living dogs.

Over 400 breeds of dog are recognized around the world, each unique for its personality, habits, and form. Most of these breeds exploded onto the scene over the past 150 years, spurred by the Victorian-era passion for the “dog fancy”-the selective breeding of dogs to enhance particular characteristics. By tinkering with its genetics, humans made the dog the most varied animal species on the planet‹and also created a host of hereditary health problems.

Dogs by Design

Despite the plethora of new shapes and sizes, dogs have retained the instincts bred into their ancestors by thousands of years of work: the urge to herd or hunt, to dig and to guard. In DOGS BY DESIGN you’ll discover how these hard-wired behaviors help different types of dogs, from hounds to herders, excel at different tasks (and why it can sometimes be so difficult to train them to do otherwise). You’ll also learn how dogs’ finely tuned senses are serving humans and saving lives.