Brainlies ! -what were some of the improvements in ships and navigation? (include at least 3)

split turbines instead of having a long spiral, they replaced it with fins, comunication was greatly improved to prevent shipwreaks and lost ships. hull composition, the hulls once were made of wood, and would break and split easily, now they are metal.

Social scientists who study prehistoric history face a unique challenge because there is very little evidence from prehistoric times

Explanation:

There are huge gaps of time for which there is no evidence at all.