Animal testing goes as far back to greek philosophers such as Aristotle (384 – 322 BC) and Erasistratus (304 – 258 BC). Whom once performed testing on animals to advance behavior of something or who aspired to alter brain activity. However there was scientists such as Galen (129 – 199 / 217 AD), who used animals in order to attempt to improve various human activity within the body. Specifically focusing on cures and treatment for those who don't have them. Later, Ibn Zuhr began to use animal testing to benefit humans in which he would perform surgeries on them to ensure that the procedures would not harm humans. He would use the animals until the procedure until it was perfected, then proceed to perform on humans. After Zuhr, the idea of animal