Eric Ralls

Crowded conditions have long been linked to lower fertility in animals, but scientists never fully understood why.

Depression is often assessed using severity scoring – the standardized scale that tells a clinician how bad someone's depression is.

Science closed the book on birth order and personality about a decade ago.

Gabapentin is the standard prescription for nerve pain following surgery, diabetes, or injury. It's a drug doctors trust and reach for often.

Skip enough protein and the body steers toward steak. It's not just hunger – but a specific pull toward the one nutrient going missing.

Physics textbooks gave the proton a radius. Independent labs around the world kept arriving at the same number, so physicists stopped worrying about it.

Every penguin dissection going back to the 1880s turned up the same puzzling scrap of tissue – a short band running from the breastbone down to both lower leg bones.

High in the stratosphere researchers have discovered something that shouldn't have gone unnoticed for this long.

Ask someone about their earliest memory, and they'll usually land somewhere around age three or four.

Glaciers tend to lose ice in patches. One mountain range takes a hit while others hold steady, and the records fill in one region at a time.