Long ago, many people sailed the seas. 
Long ago, sailors sailed far across the sea. 
Some people went to new lands. They found new plants and animals. 
But this time was also very hard. People were treated in unfair ways. Many people got sick from new germs.
These changes helped the world connect. It made the maps look like they do now. 
From the 1400s to the 1600s, many sailors traveled far. This time is called the Age of Discovery. 
Portugal led the way. Vasco da Gama found a sea route to India in 1498. 
This time changed the world. It is called the Columbian exchange. It was a way that plants, animals, and people moved between lands. This included the Old World of Europe, Asia, and Africa. It also included the New World of the Americas.
But these changes were often very hard for many people. New diseases spread to Native Americans. Many people died from these sicknesses. Europeans also took land and used people as slaves. This era helped connect the world through trade. It also made maps look more like they do today. 
The Age of Discovery began around 1418 and lasted until about 1620. 
Exploration changed how people lived and traded. Sailors looked for new maritime routes to reach the East Indies. These paths allowed for much more international trade. The expansion of these trade networks created a connected global economy. This era also saw the rise of colonial empires. Many European states began using colonialism as a way to govern. This movement changed the power balance between different lands. It created new centers of power far beyond Europe. 
Portugal led many of the earliest ocean voyages. Their exploration started with trips to the Macaronesian islands. This included the Canary Islands, Madeira, and the Azores. In 1434, they began sailing along the coast of West Africa. A famous explorer named Vasco da Gama reached India in 1498. This trip opened a direct sea route to the Indian Ocean. Later, Pedro Álvares Cabral reached South America in 1500. By 1512, the Portuguese reached the valuable Spice Islands.
Spain also sent many famous explorers across the sea. Christopher Columbus sailed west between 1492 and 1504. His voyages marked the start of colonization in the Americas. Another major trip was the Magellan expedition from 1519 to 1522. Under Juan Sebastián Elcano, this group completed the first circumnavigation of the globe. Spanish explorers also conquered Mexico between 1519 and 1521. They later moved into Peru from 1532 to 1533. The Manila galleon trade route even linked Asia and the Americas. This route lasted from 1565 all the way to 1815.
These travels started the Columbian exchange. This was a massive movement between the Old World and the New World. Plants, animals, and cultures moved between Europe, Asia, Africa, and the Americas. However, this time was also very difficult for many people. New diseases spread to Native Americans and caused many deaths. Europeans also practiced widespread enslavement and military conquest of Indigenous peoples. 
The Age of Discovery lasted from approximately 1418 to 1620.
European exploration relied on specific technological advancements. One vital tool was the magnetic compass. This device was invented during the Chinese Han dynasty. It helped sailors find their way by using magnetic fields. This improved upon older methods of using the sun and stars. Advances in ship design were also essential for long voyages. These new ships allowed travelers to cross vast oceans more effectively. Together, these tools enabled humans to navigate the Atlantic, Indian, and Pacific Oceans.
Portugal led the way in early oceanic exploration. Under Prince Henry the Navigator, they began exploring the Atlantic coast of Africa in 1418. 
Spain also launched massive expeditions that changed the world. In 1492, Christopher Columbus sailed west to reach the Indies. 
These voyages triggered the Columbian exchange. This was a massive transfer between the Old World and the New World. The Old World included Europe, Asia, and Africa. The New World refers to the Americas. During this exchange, plants, animals, and cultures moved between hemispheres. However, this period also brought great hardship. Communicable diseases spread to Native American populations. This led to rapid and devastating population declines. The era was also marked by the widespread enslavement and exploitation of Indigenous peoples.
As more nations learned of these routes, the competition for territory grew. By 1495, the French, English, and Dutch began their own explorations. 
Historians often debate the term "discovery." Some scholars, like J. H. Parry, call it the Age of Reconnaissance. They argue it was a time of expanding empirical science and geographical knowledge. Others note that the term "discovery" can be problematic. It implies that lands were empty or unknown before Europeans arrived. Many Indigenous peoples challenge this concept. They argue that "discovery" ignores their existing presence on their own lands. Today, some researchers prefer the term "Age of Contact" to describe these interactions.

🖼️ Images & Media (46)
+ 34 more
More to explore
✨ What else?
Related topics you might enjoy
🪜 Step back
Simpler topics to build understanding
What is Nepedia?
A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.