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Issue # 325 _ March 2023
Notes
Ecology
Sawdust shows which tree species has been cut
Public health
Risky sex
Energy
Hydrogen-powered plane
Health
Retinography facilitates examinations in remote locations
Astronomy
Billions of stars now visible amidst the fine dust of the Milky Way
Medicine
Medical services blighted by inequality in Brazil
Acknowledgment
Second Brazilian to head the PAHO
Environment
How egg whites can remove salt and microplastics from water
Physics
Laser beam deflects lightning in the Swiss Alps
Anthropology
A recipe for preserving the body after death
Geophysics
The ice of distant moons
Geophysics
Earth's core slowing down
Oceanography
A new kind of marine environment
Medicine
Another sign of oncoming menstruation
