Why do scientists belive the first inhabitants crossed the land bridge

 As early as the 1500s, early settlers and European thinkers were ... One theory suggested the migration of Norsemen across Greenland ... It wasn't until the mid-1920s that scientists would finally restart the search for evidence of how people ... Some scientists believed the land bridge contained uniformed .

Explanation:

congress failed to remove johnson. but it did succeed in getting control of efforts to re-build the south following america's civil war. radical republicans wanted to punish the south for starting the war. they also wanted to be sure new governments in the southern states would support the republican party.