My answer will seem very cliche, but it was the time when people started to think more openly. They began to ask questions they didn't dare to ask before, not letting religion or tradition hinder them from getting the answers they needed. Because of this, the study of science was starting to experience a sort of "birth". Theories were formulated, later proven by experiments and such.
Archaeologists discovered evidence of travel between Asia and the Americas before the arrival of early humans from Siberia is the only option that suggests the theory that early humans came to the Americas from the Siberian region is not true. This suggests that the early humans do not come from the Siberian region but from Asia.
