Cannabis drug tests measure tetrahydrocannabinol (THC) and its metabolites, which can stay in your body long after the “high” fades. Detection ranges from hours in blood or saliva to weeks or months ...

Criterion’s long-running Criterion Closet series of online shorts get a lot of their cineaste mileage out of seeing the people who make movies be dropped into the role of starry-eyed fans, selecting ...

This issue spans clinical techniques, preventive dentistry, biomaterials, oral–systemic health, pediatric care, digital innovation, and therapeutic strategies. It reflects a balance between ...

An inherent principle of publication is that others should be able to replicate and build upon the authors' published claims. A condition of publication in a Nature Portfolio journal is that authors ...

The holy city of Teotihuacan ('the place where the gods were created') is situated some 50 km north-east of Mexico City. Built between the 1st and 7th centuries A.D., it is characterized by the vast ...