how was this substance discovered?
The remains of coca leaves have been found with ancient Peruvian mummies, and pottery from the time period depicts humans with bulged cheeks.
Cocaine
The remains of coca leaves have been found with ancient Peruvian mummies, and pottery from the time period depicts humans with bulged cheeks, indicating the presence of something on which they are chewing. 
who was the last person executed by firing squad Ronnie Lee Gardner why was he executed? For killing a man during an attempted escape from a courthouse in 1985. where was the firing squad from? Utah which animals are found in this place? Wood bison, elk, moose and mountain goat. what are some of the rights given to the women? In 1887 the initial Edmunds-Tucker Act was passed by Congress in an effort to curtail Mormon influence in the territorial government. who were the settlers in the early days? Non-Hispanic White. what other crimes did gardner commit? He robbed the Cheers Tavern in Salt Lake City. was he under the influence of any drugs? Yes, cocaine. what exactly is this drug? A strong stimulant most frequently used as a recreational drug. is it used as a medication? It can be used as a local numbing agent to help with painful procedures in the mouth or nose. can a person get addicted to this? Yes, it occurs through ΔFosB overexpression in the nucleus accumbens. which country has the highest rate of using it? United States
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Cocaine [SEP] Discovery
For over a thousand years South American indigenous peoples have chewed the leaves of "Erythroxylon coca", a plant that contains vital nutrients as well as numerous alkaloids, including cocaine. The coca leaf was, and still is, chewed almost universally by some indigenous communities. The remains of coca leaves have been found with ancient Peruvian mummies, and pottery from the time period depicts humans with bulged cheeks, indicating the presence of something on which they are chewing. There is also evidence that these cultures used a mixture of coca leaves and saliva as an anesthetic for the performance of trepanation. When the Spanish arrived in South America, most at first ignored aboriginal claims that the leaf gave them strength and energy, and declared the practice of chewing it the work of the Devil.