Issues
From the Editor
Readers’ Forum
Search and Discovery
Solar steam generator needs no lenses or mirrors
A combination of inexpensive materials collects and concentrates heat from the Sun.
Rapid data exchange helps keep a secret for 24 hours
Physics-based information security doesn’t have to involve quantum mechanics.
Once-baffling success of granular resistive force theory explained
A model designed to approximate swimming in water accounts surprisingly well for animals’ locomotion in sand.
Issues and Events
Two-year colleges teach physics to widening range of students
Increasingly, partnerships ease the way to transfer to universities.
The Gathering Storm still looms
A decade on, the situation portrayed in the influential report of a deteriorating US science and technology ecosystem has, if anything, worsened.
Courtroom forensic evidence often lacks scientific validity, report finds
Improvements will require coordination among the US judicial, law enforcement, and scientific communities.
Articles
Ocean spray: An outsized influence on weather and climate
Because the production, behavior, and life span of seawater droplets are complex, measuring and modeling them require a wide range of interdisciplinary techniques.
Land’s complex role in climate change
To mitigate climate change at local, regional, and global scales, we must begin to think beyond greenhouse gases.
The carbon cycle in a changing climate
As temperatures rise, precipitation patterns change, and land- and sea-ice extents shrink, scientists are learning how the exchanges of carbon between Earth’s atmosphere, ocean, and land ecosystems respond to and feed back on climate change.
Books
New Products
Obituaries
Arthur J. Freeman
Moo-Young Han
Quick Study
Mirror asymmetry in life and in space
All life on Earth is based on amino acids that don’t align with their mirror images. Telescopes looking near the center of our galaxy may reveal the source of that asymmetry.