Scientific American Magazine Vol 325 Issue 4

Scientific American

Volume 325, Issue 4

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Massively Reducing Food Waste Could Feed the World

It would also greatly cut greenhouse gas emissions

Weird Muons May Point to New Particles and Forces of Nature

A mismatch between theory and experiment could explain big physics mysteries

Wildfire Is Transforming Alaska and Amplifying Climate Change

Although conflagrations in lower latitudes get more attention, wildfires across the high north are affecting the planet even more

Infinity Category Theory Offers a Bird's-Eye View of Mathematics

Mathematicians have expanded category theory into infinite dimensions, revealing new connections among mathematical concepts

Extreme Birding Competition Is a Cutthroat Test of Skill, Strategy and Endurance

A team of birders races to find as many bird species as possible in 24 hours

Social Capital in Black Communities Is Often Overlooked

Altruism, spirituality and civic engagement are keys to resilience

AI Designs Quantum Physics Experiments beyond What Any Human Has Conceived

Originally built to speed up calculations, a machine-learning system is now making shocking progress at the frontiers of experimental quantum physics


Scientists: When Talking to the Public, Please Speak Plainly
Listening to a Story Helps Hospitalized Kids Heal
See through the Glasswing Butterfly's Fascinating Wings
Fossilized Poop Shows How Ancient Dogs Adapted to People
Pathogen-Sensing Mask Could Detect COVID Infection
In Case You Missed It
High-Flying Sensor Detects Living Things from Far Above
The Venus's Flower Basket's Weird Fluid Dynamics Explained
Simple Mathematical Law Predicts Movement in Cities around the World
Save the Right Whales by Cutting through the Wrong Noise
A Frothy Mucus Nest Protects Frog Eggs from Drought
Concrete Buildings Could Be Turned into Rechargeable Batteries
Today's Wildfires Are Taking Us into Uncharted Territory
Graphic Science
The Solar System's Mysterious Magnetic Fields
The Science Agenda
Biodiversity's Greatest Protectors Need Protection
50, 100 & 150 Years Ago
50, 100 & 150 Years Ago: October 2021
Readers Respond to the June 2021 Issue
The Science of Health
Deadly Falls among the Elderly Are on the Rise
Human Machinations around Animals, the Joy of Nature's Eccentricities, and Other New Books
Poem: 'Earth's Accidents (Over Wadi Qumran)'
From the Editor
A Big Day Birding and a Possible Fifth Force of Nature
Abortion Rights Are at the Greatest Risk since Roe v. Wade Was Decided in 1972