Stories by Kat Long

The standard cup nest predominates today, but bird nests evolved from a more complex roofed structure

Archival mid-century footage could help physicists certify the safety and effectiveness of modern U.S. nuclear weapons

The modern definition of a species is still far from settled

In an engineering first, architects designed the slats of the fabricated steel span into a cascade of cantilevers

Mr. Fusion aside, this 1989 time-traveling comedy was spot-on about many devices that we now take for granted

A new analysis of fetal records shows that the chances of finding a boy or a girl at conception start out at 50–50 and then change over the course of pregnancy

Bidder pays big bucks for the revolutionary antibiotic

Is Danny telling the truth? Talk it over with friends

Racing fans, the government and a mining company search for ways to save Utah’s natural salt pan and its world-famous speedway

A higher diversity of bacteria lives on the eye surface of lens wearers and could explain higher infection rates

A video timeline shows 2,000 years of population growth to projections to 2050

Centuries-old ships’ logs reveal clues to Arctic warming