
Physics
A new clock shows how gravity warps time — even over tiny distances
This clock measured how gravity changes the passage of time in different places — even spots just one millimeter apart.
This clock measured how gravity changes the passage of time in different places — even spots just one millimeter apart.
Eyelash-like radio filaments accent the brightest feature in this image — a supermassive black hole.
Tardigrades often live in cool, damp moss. Their cushy life has somehow prepared them to survive the lethal radiation of outer space.
Different kinds of telescopes on Earth and in space help us to see all wavelengths of light. Some can even peer billions of years back in time.
The James Webb Space Telescope has been in the works for so long that new fields of science have emerged for it to study.
A gust of charged particles from the sun called the solar wind lights up auroras on Earth — and on other planets.
Ink analysis reveals the hidden words of Marie Antoinette's letters and who tried to hide them.
The northern and southern lights are considered natural wonders of the world. Here’s how these and related splendid sky glows form.
More precise clocks could improve technologies such as GPS and help scientists test major ideas in science.
Hundreds of newly detected gamma rays hint at environments in the cosmos that accelerate particles to energy extremes.