During the 20th century, there have been recurrent episodes of cocaine abuse in the United
States that have achieved epidemic proportions. Although the total number of people using …

Friendship-making is considered a well-established domain of deficit for children with autism
spectrum disorders (ASD; American Psychiatric Association, 2013), with this population …

The ∼26 definitions of species often yield different numbers of species and disparate
groupings, with financial, legal, biological and conservation implications. Using conservation …

Amphibian declines and extinctions are global and rapid: 32.5% of 5743 described species
are threatened, with at least 9, and perhaps 122, becoming extinct since 1980 (1). Species …

The full implications of the Habermas-Gadamer debate have yet to be drawn. In 1967, in the
context of a discussion of the methodology of social science, Habermas criticized …

Anthropogenic trade and development have broken down dispersal barriers, facilitating the
spread of diseases that threaten Earth’s biodiversity. We present a global, quantitative …

Heroin-dependent men were given buprenorphine (a partial opiate agonist-antagonist) or a
placebo under double-blind conditions on a clinical research ward where they could acquire …

We review the evidence for the role of climate change in triggering disease outbreaks of
chytridiomycosis, an emerging infectious disease of amphibians. Both climatic anomalies and …

Leg 107 of the Ocean Drilling Program drilled a west-northwest-east-southeast transect of
seven sites across the Tyrrhenian Sea, the youngest of the sub-basins of the Mediterranean …

To test the relation between chronic marihuana use and testosterone levels, we studied 27
men, 21 to 26 years of age. Plasma testosterone was measured daily before, during, and …