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slash UK slash AI for people. Welcome to Science Talk, the weekly podcast of Scientific American.

This episode is being released on July 7th.

We took last week off due to an illness that swept through the entire podcast staff.

For more info on that, consult South Park episode number 106.

Anyway, we plan to be back to the usual Wednesday release date next week.

This week on the podcast, Siam's Gary Stix discusses his article

in the July issue on human migrations, and editor-in-chief John Rennie talks about some of the

other highlights of the July issue, including an article on the neuroscience of dance. How do you

perform a brain scan on somebody doing the tango? Stay tuned.

First up, Gary Sticks, he wrote the July cover story on how DNA is revealing all kinds of new info about the history of human migration around the globe.

We spoke in the library at Scientific American.

Gary, how you doing?

Good, Steve.

Traces of a distant past. This is really fascinating that each of us carries within every cell of our bodies, these clues that relate to the

migration of the entire assemblage of humanity from Africa to everywhere that we live today.

So how is it possible? I mean, people are used to understanding that if they, researchers find fossils

or they find civilizations artifacts, you know, pottery shards and stuff like that. But how is it possible that you take

...