内容摘要：A delegate looks at her phone during the Republican National Convention Wednesday, July 17, 2024, in Milwaukee. (AP Photo/Julia Demaree Nikhinson)

A delegate looks at her phone during the Republican National Convention Wednesday, July 17, 2024, in Milwaukee. (AP Photo/Julia Demaree Nikhinson)

Animal and Plant Health Inspection Service, Boise, Idaho (44,623 square feet)Federal Energy Regulatory Commission, Carmel, Ind. (247 square feet)

Agricultural Marketing Service, Everett, Mass. (2,789 square feet)Indian Health Service Navajo, Farmington, N.M. (2,000 square feet)Bureau of Indian Affairs, Fredonia, Ariz. (1,500 square feet)

United States Fish and Wildlife Service, Grand Junction, Colo. (1,444 square feet)National Oceanic Atmospheric Administration, Hampton, Va. (911 square feet)

Employment Standards Administration, Wage and Hour Division, Harlingen, Texas (612 square feet)

Rural Housing Service, Harrisburg, Pa. (34,467 square feet)like mastodons, saber-toothed cats and dire wolves that once roamed North and South America.

But new research from several sites is starting to suggest that people came to the Americas earlier —— than once thought. These findings hint at a remarkably different life for these early Americans, one in which they may have spent millennia sharing prehistoric savannas and wetlands with enormous beasts.

This combination of illustrations provided by researchers in 2024 shows large animals which once roamed prehistoric North and South America. Top row from left, a glyptodon, a lestodon, and a horse. Bottom row from left, a mastodon, a saber-toothed cat and a toxodon. (Mauro Muyano via AP)This combination of illustrations provided by researchers in 2024 shows large animals which once roamed prehistoric North and South America. Top row from left, a glyptodon, a lestodon, and a horse. Bottom row from left, a mastodon, a saber-toothed cat and a toxodon. (Mauro Muyano via AP)