Daggers are ubiquitous yet poorly understood artifacts from prehistoric Europe.

They first appeared near-simultaneously in Eastern/Central Europe, the Alps, and the Italian peninsula in the early 4th millennium BCE.

From the outset, daggers were made from either flint or copper (first alloyed with arsenic, and later with tin) depending on source proximity and cultural preferences.

By the early 2nd millennium BCE, daggers were being made, used, and exchanged from Crete in the south to Scandinavia in the north, and from the Ukrainian steppes in the east to Ireland in the west.

“Psychedelics as a topic is exploding back into both popular culture and academic study, the potential here is tremendous,” said study author Tianhong Tim Qiu of Western University. “Rightfully, much of present research is focused on clinical/medical applications, often as alternative treatments for mental health disorders. However, many users have claimed (anecdotally) great benefits to their own psychological wellbeing. That is, healthy people may