Lamarckian Evolution is a theory proposed by the French biologist Jean-Baptiste Lamarck in the early 19th century. It suggests that organisms can pass on traits acquired during their lifetime to their offspring. For example, if an animal develops stronger muscles from frequent use, its descendants may inherit those stronger muscles. This idea contrasts with Darwinian evolution, which emphasizes natural selection and genetic inheritance. While Lamarck's theory was influential in its time, it has largely been discredited in modern biology. Today, genetic changes are understood to occur through mutations and are not influenced by an organism's experiences or behaviors during its life.