Researchers from Tulane University and the Proyecto Templo Mayor analyzed 788 obsidian artifacts from Tenochtitlan, revealing that the Mexica (Aztec) Empire sourced this important material from at least eight different locations, including regions outside their political control. While 90% of artifacts were made from green obsidian from Sierra de Pachuca (especially for ceremonial purposes), the diversity of obsidian sources suggests sophisticated trade networks rather than just conquest-based acquisition. The study tracked changes in obsidian use from 1375-1520 CE, showing how the Mexica standardized ritual obsidian sources after consolidating power around 1430 CE, providing insights into the empire's economic networks and political influence.

A Simon Fraser University new study is challenging a commonly held misconception that there’s little organizations can do to encourage employees to disclose mental health concerns. World Health Organization data shows 15 per cent of adults have a mental health concern, while other surveys have found 65 per cent of employees believe mental health concerns interfere with their job. Yet many organizations, even those with mental health supports and programs, see disclosure as a personal decision they have no influence over. 

“That’s just not what we saw in the data,” says Zhanna Lyubykh, assistant professor at Beedie School of Business and lead author of the study published in Human Resource Management. “Organizations can do a lot to help employees disclose. Much of it comes down to employee perceptions of how disclosure is going to be handled, which is absolutely within an organization’s control.”  

The Met Office and the University of Exeter will host scientists, policy makers and business leaders for vital talks assessing growing risks from climate change – and action to address it.

A decade-long study of snowsport instructors has revealed what it means to seek a career that puts enjoyment and personal growth above profits and deadlines.