sciencehabit (1205606) writes "Seen from above, the jagged rocks strewn about the Chincha Valley desert in Peru seem inconspicuous. But stand in the desert itself and these rocks form lines that stretch toward the horizon. Researchers have found that these lines were probably ancient signposts for the Paracas culture more than 2000 years ago, guiding people across the desert to gathering places for the winter solstice."
"Today's robots are very primitive, capable of understanding only a few
simple instructions such as 'go left', 'go right', and 'build car'."