Which Legal Issue Complicates the Use of AEDs to Save Lives?
AEDs can restart a stopped heart, but legal questions around liability, training, and Good Samaritan laws can complicate their use. Here's what you should know.
What Parasites Live in Humans: Worms, Protozoa & More
Learn about the parasites that can live in the human body, from single-celled protozoa to worms and skin parasites, and how they're detected.
Which Is Worse, ALS or Parkinson’s? Key Differences
ALS and Parkinson's both affect movement, but differ greatly in progression, life expectancy, and quality of life. Here's how they compare.
What Is Severe Foraminal Narrowing and What Causes It?
Severe foraminal narrowing compresses spinal nerve roots, causing pain, numbness, or weakness. Learn what causes it, what symptoms to watch for, and how it's treated.
Which Fish Have Lungs? Lungfish and Bichirs
Meet the fish that actually have lungs—lungfish and bichirs—and learn why lungs evolved in water long before life moved onto land.
What Is a Rubik’s Cube Algorithm and How Does It Work?
Rubik's Cube algorithms are repeatable move sequences that shift pieces predictably. Here's how they work and why speedcubers rely on them.
Where Does Male Pattern Baldness Start First?
Male pattern baldness typically begins at the temples or crown. Learn why these areas thin first and what early hair loss actually looks like.
What Is the Ideal Body Condition Score for Breeding Cattle?
Cows in the right body condition breed back faster and raise healthier calves. Here's the target score and what it costs when cattle fall short.
What Precautions Should You Take in Twin Pregnancy?
Carrying twins comes with extra considerations. Learn what to eat, watch for, and discuss with your doctor to support a healthy twin pregnancy.
What Was the Original Use of a Chainsaw: Childbirth
Before chainsaws felled trees, they were surgical tools invented to make childbirth safer. Here's the surprising medical history behind the familiar machine.