4,000-year-old artifacts shed light on early Native Americans   Dr. Brian Robinson photographing an old land surface under the beach at the dig site in Seabrook, where possible evidence of climate change was discovered this summer. Photo by Sky Heller SEABROOK — New archaeological findings on land protected by Seabrook Station nuclear power plant read more Archaeologists find 4,000-year-old artifacts at Seabrook nuclear plant – Robinson, Nurse, Heller et al.