This historic artifact, a carved black limestone slab dating back to ... Now, by analyzing tiny fossils embedded in the stone ...

Researchers have revealed remarkable 15,800-year-old ... artifacts from the last ice age. The engravings, described in a study published in the online journal PLOS ONE, appear on stone "plaquettes ...

During the survey, researchers noticed a rock shelter “carved into a cliff face about 40 meters (130 feet) above the stream” with some stone artifacts nearby. Curious, they decided to investigate.