Public research university in Hamilton, Ontario, Canada, with six faculties and a history dating to 1887
Defense Secretary Pete Hegseth has announced a testosterone screening program for service members, extending annual checks to those 30 and older while offering voluntary testing for those under 30. Treatment remains voluntary, framed as restoring natural health rather than artificial enhancement. The move follows broader debates around testosterone policy in the administration.
The Department of Defense has initiated mandatory testosterone screenings for service members aged 30 and older, aiming to boost performance and resilience. Experts warn the policy lacks clear scientific backing and could pose health risks, especially for women. The measure has sparked debate over guidelines and priorities within the force.
New genetic analysis of Chilean mummies links smallpox to European strains, providing the strongest outside-Americas connection yet and clarifying how the disease spread during colonization. Two ancient infections date to 1492–1631, suggesting European origins for the American strains.
Biologists report white-nose syndrome has reached Canada’s Northwest Territories, raising urgent questions about bat populations and North America’s winter hibernacula. The Pd fungus threatens thousands of hibernating bats, with experts forecasting impacts across the region while researchers race to understand its spread.