The history of pharmacy as a modern and independent science dates back to the first third of the 19th century. Before then, pharmacy evolved from antiquity as part of medicine. The history of pharmacy coincides well with the history of medicine, but it's important that there is a distinction between the two topics. Pharmaceuticals is one of the most-researched fields in the academic industry, but the history surrounding that particular topic is sparse compared to the impact its made world-wide. Before the advent of pharmacists, there existed apothecaries that worked alongside priests and physicians in regard to patient care. Paleopharmacological studies attest to the use of medicinal plants in pre-history. For example, herbs were discovered in the Shanidar Cave, and remains of the areca nut (Areca catechu) in the Spirit Cave. Prehistoric man learned pharmaceutical techniques through instinct, by watching birds and beasts, and using cool water, leaves, dirt, or mud as a soothing agent. Sumerian cuneiform tablets record prescriptions for medicine. Ancient Egyptian pharmacological knowledge was recorded in various papyri, such as the Ebers Papyrus of 1550 BC and the Edwin Smith Papyrus of the 16th century BC. The very beginnings of pharmaceutical texts were written on clay tablets by Mesopotamians. Some texts included formulas, instructions via pulverization, infusion, boiling, filtering and spreading; herbs were mentioned as well. Babylon, a state within Mesopotamia, provided the earliest known practice of running an apothecary i.e. pharmacy. Alongside the ill person included a priest, physician, and a pharmacist to tend to their needs. In Ancient Greece, there existed a separation between physician and herbalist. The duties of the herbalist was to supply physicians with raw materials, including plants, to make medicines. According to Edward Kremers and Glenn Sonnedecker, "before, during and after the time of Hippocrates there was a group of experts in medicinal plants.