AstronomyMarch 1, 2019
Neutron Stars: Nature’s Weirdest Form of Matter
The insides of neutron stars—the densest form of matter in the universe—have long been a mystery, but it is one that scientists are starting to crack
Volume 320, Issue 3
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Features
BiologyMarch 1, 2019
The Orca’s Sorrow
A spate of new observations of grief in animals hints at why some species mourn and others do not
Mental HealthMarch 1, 2019
Mania May Be a Mental Illness in Its Own Right
Hundreds of thousands of people experience mania without ever getting depressed. Why does psychiatry insist on calling them bipolar?
EarthMarch 1, 2019
Droughts and Floods May Level Off until 2050, but Then Watch Out
Strange waves in the jet stream foretell a future full of heat waves and floods
BiotechMarch 1, 2019
Untangling the Formation of DNA Loops
New discoveries on ancient loops in DNA offer clues into gene regulation
BehaviorMarch 1, 2019
People Drawn to Conspiracy Theories Share a Cluster of Psychological Features
Baseless theories threaten our safety and democracy. It turns out that specific emotions make people prone to such thinking
EvolutionMarch 1, 2019
The Other Tool Users
Excavations of stone tools left behind by nonhuman primates are illuminating the origins of technological innovation
Departments
Advances
Climate Change Is Having a Major Impact on Global Health
Humpback Whale Calls Remain Constant over Decades
How Vision Helps Cyclists Communicate in a Pack
Parasitic Wasp Larvae Force Young Social Spiders into Deadly Hermitage
Most Microbial Species Are "Dark Matter"
Wayward Satellites Test Einstein's Theory of General Relativity
In Case You Missed It
Ultrasound Beams and Nanoparticle Cages: Toward More Targeted Brain Treatments
Drunk Witnesses Remember a Surprising Amount
From the Editor
“Outrageous” Objects and Other Adventures in Science
Letters
Readers Respond to the November 2018 Issue
The Science Agenda
Don't Let Robots Pull the Trigger
Forum
We Need More Diversity in Genomic Databases
The Science of Health
Are All Our Organs Vital?
Ventures
Technology Is Upending How Music Is Made
Reviews
The True Story of Einstein's Wife, a Revised History of Humans, and Other New Science Books
The Intersection
More Data Don't Necessarily Help You Make Small Decisions
Anti Gravity
Volunteers Jumped with or without a Parachute to Gauge Its Effectiveness
50, 100 & 150 Years Ago
Hating Daylight Savings in 1919; Plans for the Panama Canal in 1869
Graphic Science