Galileo's Law states that in the absence of air resistance, all objects fall at the same rate regardless of their mass. This means that a heavy object and a light object dropped from the same height will hit the ground simultaneously if no other forces act on them. This principle was famously demonstrated by Galileo Galilei in the late 16th century. The law highlights the concept of gravitational acceleration, which is approximately 9.81 meters per second squared on Earth. Galileo's Law laid the groundwork for later scientific advancements, including Isaac Newton's laws of motion and the universal law of gravitation.