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Native people developed time-tested religious rituals using these plants that were passed down through countless generations.

This article is mostly about the adaptive advantage of alkaloids in plants, and some remarkable examples of psychoactive (hallucinogenic) alkaloids found in some of the most amazing plants on earth.

This method is applied to two important sites in Russia and allows us to report the earliest direct ages for the presence of anatomically modern humans on the Russian Plain.

These dates contribute considerably to our understanding of the emergence of the Mid-Upper Paleolithic and the complex suite of burial behaviors that begin to appear during this period.

These inaccuracies in turn frustrate the development of archaeological chronologies and, in the Paleolithic, blur the dating of such key events as the dispersal of anatomically modern humans.

Here we describe a method to date hydroxyproline found in collagen (∼10% of collagen carbon) as a bone-specific biomarker that removes impurities, thereby improving dating accuracy and confidence.

Mitochondria are specialized structures unique to the cells of animals, plants and fungi.For those interested in further reading, the references at the end of this article are a good place to start.The Ayurveda contains a wealth of knowledge on health sciences.Archaeological bones are usually dated by radiocarbon measurement of extracted collagen.However, low collagen content, contamination from the burial environment, or museum conservation work, such as addition of glues, preservatives, and fumigants to “protect” archaeological materials, have previously led to inaccurate dates.

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