The photos, taken by NASA’s Lunar Reconnaissance Orbiter, show a dark mark and a faint halo in the Mare Frigoris region—also ...

Red sprites hover between 40 and 55 miles high. Up there, the air is thin, so electric fields can spark gigantic filaments ...

Interviews with farmers and analysts across Oklahoma, Kansas and Nebraska revealed a vast disparity in profit for wheat ...

This mosaic photograph is composed of 26 images. Scroll down to see the full version, which creates a 360-degree continuous panorama. Ever since a British officer in 1903 captured what is believed ...