Fossils can tell you that Pangea time really happened. Let’s say you find a fossil in North America for something normally found in Africa or a fossil in Europe for something that would otherwise be in South America. Wouldn’t that explain continental drift happened (the continents split)? It most certainly does.
Infant mortality rates would decrease. Greater quality or more widespread health care makes medical experts more accessible, so more people would have access to doctors and high-quality resources when their infant needs it.
A greater population would use contraceptives. Health care makes health supplies more accessible. More people would be able to afford and attain some form of contraceptives.