Artist's impression of planets forming around a young star. New, very precise measurements of krypton isotopes from deep in the Earth show that water, carbon and other volatile materials were ...

Neon isotopes from glassy rocks on the ocean floor may hold the key to understanding how Earth formed 4.5 billion years ago. Depending on how slowly or quickly our early planet assembled from the ...

Astronomers at the UA have observed neon, a gas best known for its use in colorful electric signs, in disk-shaped clouds of dust and gas that form around young sun-like stars. It is in such clouds, ...