Robert Brown

Robert Brown was a 19th-century Scottish botanist who is best known for discovering the phenomenon known as Brownian motion in 1827. This observation involved tiny particles suspended in fluid moving randomly and erratically under a microscope. His work provided important insights into atomic theory, showing that particles are in constant, unpredictable motion, which supported the idea that matter is made up of atoms and molecules. Brown’s discovery played a key role in developing modern physics and chemistry, helping scientists understand the atomic nature of matter.