Explore important events in the timelines of science. Timelines of Science and the Circumference Around the World: A Journey Through Knowledge and Discovery Science is not built in a single day—it is the result of thousands of years of curiosity, experimentation, failure, and discovery. When we explore the Timelines of Science, we are actually walking through the story of human intelligence evolving step by step. At the same time, understanding concepts like the circumference around the world shows how science connects directly to our planet and daily life. This article takes you through a simple, human-friendly journey of how science developed over time and how it helped us understand Earth itself. Understanding the Timelines of Science The Timelines of Science refer to the chronological development of scientific knowledge from ancient times to the modern digital age. It is a roadmap of how humans discovered laws of nature, mathematics, space, medicine, and technology. Science did not start with advanced laboratories or computers. It began with simple observations—looking at stars, seasons, rivers, and human body behavior. Let’s explore this journey step by step. Ancient Science: The Beginning of Curiosity In ancient times, humans tried to understand nature through observation and logic. Egyptians used early geometry for building pyramids Babylonians studied astronomy and planetary movement Indians developed concepts of zero, Ayurveda, and astronomy Greeks like Aristotle and Archimedes introduced logic and physics During this phase of the Timelines of Science, people began asking questions like: Why does the sun rise and set? How do objects move? What is the shape of Earth? These early ideas laid the foundation of modern science. Medieval Science: Knowledge Preservation and Growth During the medieval period, scientific knowledge was preserved and expanded in different parts of the world. Islamic scholars translated and improved Greek scientific texts India contributed advancements in mathematics and medicine China developed innovations like paper, compass, and gunpowder This period helped science survive and grow even during times of political instability. The Timelines of Science during this era show how knowledge traveled across cultures and continents. Renaissance: The Scientific Awakening The Renaissance period (14th–17th century) marked a major turning point in science. Famous scientists like: Galileo Galilei Isaac Newton Johannes Kepler began challenging old beliefs and introduced scientific methods based on experiments. This was also the time when humans started understanding Earth more scientifically, including its shape, movement, and measurements such as the circumference around the world. Understanding the Circumference Around the World The circumference around the world refers to the total distance around Earth at the equator. It is approximately 40,075 kilometers. This discovery was not simple. Early scientists used shadows, angles, and geometry to estimate Earth’s size. One of the most famous early measurements was made by Eratosthenes, who calculated Earth's circumference using sunlight angles in two different cities. This idea became a breakthrough moment in the Timelines of Science, proving that Earth is round and measurable.