Explore the controversial issue of Testosterone Deficiency Syndrome (TDS) and the impact of America's testosterone paranoia with insightful analysis and perspectives on the topic.

Kondratieff Wave, named after Russian economist Nikolai Kondratieff, refers to cycles, lasting up to 60 years, experienced by capitalist economies.

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Element cycles articles from across Nature Portfolio Element cycles are the biogeochemical pathways by which elements are transformed and moved through various states by geological and biological ...

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