NASA's Curiosity on Mars sent back images of sun rays for the first time as the rover begins a study on clouds and their composition high up in the atmosphere.

A close-up of the sun rays seen by Curiosity on Feb. 2 (Image credit: NASA/JPL-Caltech/MSSS). Martian clouds, which are mostly made from ice crystals of both water and carbon dioxide, normally ...

Now, an international team of researchers hopes that those all-powerful rays could also lead to something far stranger and more elusive — the invisible substance known as dark matter.

Astronaut Shane Kimbrough posted some photos of Cleveland taken from space as the International Space Station orbits the Earth.

Sandra Critelli was on a boat in the Gulf of Mexico that found itself surrounded by thousands of cownose rays. She captured the incredible event with her camera and the images are incredible.

The images would be available for download via the "Blue Button" feature on the VA's My HealtheVet website, though VA also is working on a way for veterans to personally transmit the images to ...

Heavenly images from the depths of space as Hubble telescope reveals the mysteries of the universe. Messier 77 emits strong radiation, caused by a very active black hole that is around 15 million ...