Finding fossils can be a fact of life for construction crews excavating in California. That's what happened when crews broke ground to begin the new Bay Area Calaveras Dam in 2013. They just didn't expect to find so many.
원문출처 : https://www.cnn.com/2018/04/20/us/california-fossil-treasure-trove/index.html
원문출처 : https://www.cnn.com/2018/04/20/us/california-fossil-treasure-trove/index.html