The Journey of Man: A Genetic Odyssey
Allen Lane, 2002 - 224 pages
Around 60,000 years ago, a man walked the soil of Africa. Every person alive today is descended from him. How did he come to be father to all of us - a real life Adam? To find out, Spencer Wells embarked on a unique voyage of discovery, travelling the world and deciphering the genetic codes of people from the Sahara Desert to Siberia. He reveals how our DNA enables us to work out where our ancestors lived, (and who they may have fought, loved and learned from); to re-trace their footsteps from Africa to the far corners of the earth ; to understand how we evolved into such a huge variety of sizes, shapes and races - and, ultimately, to create a family tree for the whole of humanity.
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This is a rather specialized term for something we have an innate sense of - the
tendency of small samples to reflect a biased view of ... This random fluctuation in
a sampled group is due to the small number of individual events in the sample .
These methods measure the ratio of different isotopes of an atom present in the
sample . It is possible to do this because almost all atoms come in more than one
' flavour ' , depending on how many subatomic building blocks ( particles called ...
a rate of breakdown depends on the so - called half - life of C - 14 , which is the
amount of time required for one - half of the C - 14 in a sample to decay - around
5 , 700 years . Since carbon is used to build organic molecules , like those found
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Review: The Journey of Man: A Genetic OdysseyUser Review - Joe - Goodreads
Conclusion of Wells' work is that we're all descendants of a single man who lived in Africa about 20,000 years ago. And he is convincing! Very interesting book, with some genetic science thrown in to spice it up (but it doesn't get in the way). Read full review
LibraryThing ReviewUser Review - snash - LibraryThing
The book presents a picture of man's migrations between 60,000 and 10,000 years ago. It is a companion book with the TV special and provides more background into the scientific rational of the study and its conclusions. It is presented in a manner quite understandable to the lay person. Read full review