NORTH ATTLEBORO, Mass. (Dec. 2) -- U.S. researchers say they have discovered what appears to be the oldest imprint of a prehistoric insect, made while the dragonfly-like creature was still alive.
The imprint found at a rocky outcrop near a large shopping center in North Attleboro, Mass., is believed to have been made by an insect about three inches long as it stood on mud some 312 million years ago.