Question

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

Answer 1

because whatever is buried there is from the past and things form the past are different from now and basically preserved everything form that time.

Answer 2

Answer:

The burial ground being like a "time capsule" means there is evidence from past lives as to what they looked like, what they dressed like, etc. This evidence can help scientists with their studies.