Archaeologists commonly use theoretical models, experiments, and observations of the world as it is today to try to explain what happened in the past.
(Archaeologists; commonly use; theoretical models, experiments, and observations of the world; T:as it is today to try to explain what happened in the past) (it; is; T:today; to try to explain what happened in the past) (it; to explain; what happened in the past)
Archaeologists it it
commonly use is to explain
theoretical models, experiments, and observations of the world T:as it is today to try to explain what happened in the past
T:today to try to explain what happened in the past
what happened in the past