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The rapid expansion of human activities threatens ocean-wide biodiversity. Numerous marine animal populations have declined, yet it remains unclear whether these trends are symptomatic of a chronic accumulation of global marine extinction risk. We present the first systematic analysis of threat for a globally distributed lineage of 1,041 chondrichthyan(More)
Using data for 25,780 species categorized on the International Union for Conservation of Nature Red List, we present an assessment of the status of the world's vertebrates. One-fifth of species are classified as Threatened, and we show that this figure is increasing: On average, 52 species of mammals, birds, and amphibians move one category closer to(More)
This article uses panel data and multiple regression of follow-up on baseline variables to test hypotheses that over time: (1) control theory variables are related to decreases in drug use and to each other, (2) labeling theory variables regarding drug use are related to increases in drug use, increases in each other, and negatively to control theory(More)
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