Lesson 3: The Scientific Revolution

Key Idea

Before the Scientific Revolution, science was very different. Ancient Greek and Roman thinkers used observation to explain the natural world. However, they did not use experiments to test their theories, which were based on reason alone.

During the Middle Ages, European scholars focused on preserving these ancient ideas. At the same time, Islamic scholars translated and studied these texts, making their own advances in fields like medicine and astronomy. This work laid the groundwork for new discoveries.

Key Idea

For centuries, people accepted the geocentric theory, which placed a motionless Earth at the center of the universe. This ancient idea, supported by tradition and the Church, was first seriously challenged in 1543 by astronomer Nicolaus Copernicus.

Copernicus proposed a revolutionary heliocentric model. In this new system, the Sun was the center, and Earth was just one of several planets that orbited it. This idea directly contradicted long-held beliefs about humanity's central place in the cosmos.

Key Idea

The new heliocentric model challenged traditional beliefs. For centuries, the Catholic Church taught that Earth was the center of the universe, an idea that fit its interpretation of scripture.

When Galileo used his telescope to support the sun-centered theory, his work was seen as a direct threat. Church leaders feared these new ideas would weaken people's faith and the Church's authority.

Key Idea

The new scientific thinking spread far beyond astronomy. Isaac Newton developed laws of motion and gravity, explaining how the physical world worked. In medicine, Andreas Vesalius challenged ancient Greek ideas by dissecting human bodies. His work created the first accurate understanding of human anatomy.

Other discoveries revealed a world unseen by the naked eye. Robert Hooke used a microscope to discover cells, the basic units of life. Meanwhile, Robert Boyle's experiments in chemistry helped define elements as the fundamental substances of matter.