Take a good look, because this may be the oldest piece of art in the Americas. Archaeologists say it's also our earliest drawing of a human. Of course, when your Pictionary partner has been dead for been ten millennia, no one can tell you you're wrong.

In eastern Brazil, the cave of Lapa do Santo is a deep toy box for anthropologists. It's a long, sloping space that sheltered groups of humans intermittently over 11,000 years of history. The ground is made of wood ash, from human hearths, packed as deep as 13 feet. It's full of graves.

On one of the final days of their expedition, having dug to the very bottom of that ashy floor, a group of Brazilian researchers led by Walter Neves discovered the stickman you see above. He's about a foot tall, chipped out of the rock. I say "he" because that projection on the lower right is, according to the experts, a phallus.

Radiocarbon dating of charcoal on the wall showed it to be more than 10,000 years old. And the carving was buried even farther down in the layers of ash than a hearth known to be about the same age. This means the figure can be "confidently" placed at 10,500 years old, Neves writes, and may be as ancient as 12,000 years.

Personally, "human male" would not have been the first thing I thought when I saw this piece of cave art. Why not a tree (with...exposed roots)? Some kind of flowering plant? A map of the cave's fire exits? Assuming it is a picture of a person, maybe it's a cave person's patent application: "After extending the arms and opening the mouth, step two is to squeeze your companion. I'm calling it a hug."

What makes researchers see a human, though, is the style of other rock art findings in Brazil. The Lapa do Santo art is similar to regional carvings such as these:

The fellows above have the same C-shaped head, and indeterminate number of lower appendages, as the Lapa do Santo stick figure. (The tall hats or hair must not have caught on everywhere.)

Is that a pregnant cave woman with a baby flying out of her?

Maybe this culture just hadn't invented any numbers bigger than 3, and therefore couldn't pin down how many limbs are on the average human.

OK fine, now I see the phalluses. That's actually pretty disturbing.

If you look closely, you can see some stick people along with stick deer in the cave wall above (and at least one stick plant).

Earliest recorded zombie attack.

As sketchy as he is, the Lapa do Santo petroglyph has now claimed the title of the oldest known rock art in the Americas. In 8000 BC, or maybe before, someone was determinedly chipping that stick figure and all of his extra limbs into a rock wall in Brazil.

The similarity of cave art styles across different regions of Brazil suggests to researchers that these far-flung cultures were connected somehow. Caves a thousand miles apart show the same gape-mouthed, extra-manly drawings. This suggests, Neves writes, that Brazil was inhabited gradually rather than all at once. As human groups grew and traveled, they carried their symbolism with them.

If you have more solutions to suggest for this prehistoric Pictionary game, please share them below. But be mindful of the cave children.

Neves, W., Araujo, A., Bernardo, D., Kipnis, R., & Feathers, J. (2012). Rock Art at the Pleistocene/Holocene Boundary in Eastern South America PLoS ONE, 7 (2) DOI: 10.1371/journal.pone.0032228

Images: First two from Neves et al. Others from A. Prous and G. Martin, found in figure S3 of Neves et al.