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This is Scientific American 60-second science. I'm Cynthia Graber.

As humans developed civilizations in Eurasia and Northern Africa, they also domesticated animals for food and labor.

Horses, cows, goats, pigs, sheep, and a few others.

But no evidence existed for the deliberate cultivation and breeding of animals in North or Central America until now.

So at this ancient city of Teotu Koukan in particular, which is really one of the deliberate cultivation and breeding of animals in North or Central America until now.

So at this ancient city of Teotu, O'Can in particular, which is really one of the earliest urban cities in North America.

Andrew Somerville of the University of California, San Diego, talking about the metropolis that

once existed some 30 miles northeast of present-day Mexico City.

Previous excavations have found a lot of rabbits,

but at one compound in particular,

they found more evidence that they were interacting with rabbits more intensively.

There was a statue of a rabbit.

There was evidence that maybe they were butchering them.

And this compound, which is called Oztoyahualco,

actually had almost twice as many rabbit bones relative to the other complexes at the city.

So it did seem like something was different with this particular compound.

Summerville and colleagues tested 134 rabbit bones at the 2,000-year-old site, as well as 13 contemporary samples.

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