I think over the ages people traveled in many different ways, and those ways helped find some places we live today. Before cars, airplanes, and trains, people had to travel by foot, horse and buggy, wagons, and ships. They didn't have the technology we have today to travel as fast as we did. Traveling by foot took longer than wagons but not as fast as cars and airplanes are. When people wanted to travel to Africa from Europe the fastest way was by ships. But that took longer than it does today.
People devote their lives to exploring for many reasons. They could be curious about what is in the world and would like to get their questions answered. There could be a reward for finding something so they would want the reward and maybe even get their name in a book. People would want to be famous for finding something.
They make many sacrifices when they explore. They make the sacrifice to leave their love ones to go exploring the unknown. They sacrifice their lives going on the dangerous sea to find something they are not even sure they are going to find. They have a lot of courage to explore the unknown .