Who Was the Spy at Los Alamos? All Four Revealed
Meet the four spies who passed Manhattan Project secrets to the Soviets — and learn how much their espionage actually shaped the Cold War nuclear race.
Why Do I Have Disturbing Dreams and How to Stop Them
Disturbing dreams are often tied to stress, trauma, or lifestyle habits. Learn what's behind them and what you can do to sleep more peacefully.
Why Do Some Months Have More Days Than Others?
Our uneven month lengths trace back to ancient Rome, Julius Caesar, and the tricky math of keeping a calendar in sync with Earth's orbit.
What Kind of Arthritis Is in the Hands?
Several types of arthritis affect the hands, and knowing which joints hurt can help point toward the right diagnosis and treatment.
What’s Wrong With Palm Oil: The Health and Planet Costs
Palm oil is tied to deforestation, labor abuses, and health concerns. Here's what the evidence says and why the solution isn't as simple as avoiding it.
What Is Upwelling? How Deep Ocean Water Rises
Upwelling brings cold, nutrient-rich water from the deep ocean to the surface, shaping marine ecosystems, coastal climates, and global weather patterns.
What Is UHMW Polyethylene: Properties and Uses
UHMW polyethylene is a tough, low-friction plastic used in joint replacements and heavy industry. Here's what sets it apart and why it's tricky to work with.
Will We Stop Climate Change or Just Slow It Down?
Current trends suggest we're on track to slow climate change, not stop it. Here's an honest look at where things stand and what it would actually take to do more.
Why Are Teeth Sensitive? Causes and Treatments
Tooth sensitivity usually comes down to exposed dentin. Learn what's causing yours and which treatments actually help.
Why Can You Eat Steak Rare But Not Chicken?
The safety difference between rare steak and undercooked chicken comes down to where bacteria live in the meat and how each animal is processed.