"Ancient Greek Philosopher-Scientists" delves into the groundbreaking ideas of the Pre-Socratic philosophers, the earliest thinkers who sought rational explanations for natural phenomena, moving away from traditional religious views. This collection presents the surviving fragments and testimonials of ten influential philosopher-scientists, showcasing their pivotal role in laying the foundations of Western philosophy and various sciences. Their inquiries into the nature of existence and the cosmos resonate profoundly today, as we continue to grapple with questions of knowledge, belief, and the natural world.