The human genome actually is an archive of our population histories, all of our ancestors who have

contributed to our genomes. You can look at their histories just basically by sequencing DNA or

genotyping DNA, looking at specific variants across the genome and using population genetics then

to work with that DNA and compare it to other populations and other individuals and say, okay,

I can see which or I can recreate the point at which these lineages last share to common ancestor

and you can kind of do that going further and further back into the past.

Hello and welcome to Wise This Happening with me, your host Chris Aes.

So a few weeks ago my family and I were vacationing in Arizona. We went to the Grand Canyon,

then we went to Sedona, which is sort of the Red Rock region, which was completely amazing.

And one of the most incredible parts of the Sedona trip was going on a number of hikes,

one of which culminated in kind of going up into these rocks and finding this cliff dwelling

that have been inhabited by indigenous people that lived in that part of Arizona.

The Spanish called them the Senagua, which just means without water. Obviously that wasn't the

name they had for themselves. They left the region around 1425, we think, because basically of a

drought, they were sort of chased out, but their descendants are, we believe the Hopian Navajo

people who of course are still in Arizona today, the Navajo Reservation, one of the largest,

if not the largest in the entire nation. And I got to say that being out there and seeing,

we went to two different cliff dwelling rooms, it really blew my mind. I guess I sort of feel like

when I look at places that get a lot of water, have fairly temperate temperatures, I think to myself,

okay, like I can start to conceive of how one would scratch out a living if you had to make a living

without all of the conveniences of modern industrial capitalism. You could grow some corn,

you'd have to make a structure, you'd have to burn some heat for wood, but being in a place that

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