California’s Sierra Nevada mountain used to have more meadows, nearly three times as many. That’s according to a report released earlier this month by the U.S. Forest Service’s Pacific Southwest Research Station. Researchers used a subset of artificial intelligence known as machine learning to identify and map locations of these lost meadows, which have disappeared over 150 years due to livestock grazing, mining, road-building and wildfires. … In some instances, the models expanded into areas where meadows were known to already exist. Potential new meadows, or previously unrecognized areas, were also identified and will now be used in the forest service’s meadow restoration effort.