One historian said that this burial ground is like a "time capsule." What does this mean?

Which of these resulted in an actual slow down or limiting of the u.s. and soviet nuclear arsenals?

What was one major cause of worldwide conflict during the first decade of the 21st century?

At the time of the brown v. board of education decision,schools were segregated everywhere in the country.several states had laws requiring segregated schools.schools in nearly every state has been desegregated.segregation was common in the north, but not in the south.