Spencer Wells quotes:

We spent an enormous amount of time as hominids and as primates living as hunter-gatherers. That is the natural way for us to live, and we're suddenly living in this profoundly unnatural way, and we're still in the process of adapting to it and working out how to live with it.

What if I told you every single person in America - every single person on Earth - is African? With a small scrape of cells from the inside of anyone's cheek, the science of genetics can even prove it.

Imagine you're copying a very long document, and occasionally you'll put an A where there should be a C. And that mistake has been translated down through the generations, and more mistakes have accumulated. So the longer the lineage has been in existence, the more mistakes the sequence is going to have.

If you go far enough back, your genome connects you with bacteria, butterflies, and barracuda - the great chain of being linked together through DNA.

If you go far enough back, your genome connects you with bacteria, butterflies, and barracuda - the great chain of being linked together through DNA."

It turns out that every person alive today can trace his or her ancestry back to Africa. Everyone's DNA tells a story of a journey from an African homeland to wherever you live.

DNA ties us all together; we share ancestry with barracuda and bacteria and mushrooms, if you go far enough back.

Every drop of human blood contains a history book written in the language of our genes.

So what we can answer [as geneticists] is questions about biology, about biological ancestry. But to make any sense of that historically we have to contextualize it -- the archaeology, the linguistic pattern, even the climatology.

Taken with the archaeological data, we can say that the old hypothesis of an invasion of people - not merely their language - from the steppe appears to be true.

The greatest history book ever written is the one hidden in our DNA.

We are all Africans under the skin.