U.S. astronaut Nichole "Vapor" Ayers captured a spectacular view of a phenomenon known as a "sprite" blazing to life above an ...

Low-light image enhancement methods based on classic Retinex model attempt to manipulate the estimated illumination and to project it back to the corresponding reflectance. However, the model does not ...

In the frozen reaches of the planet—glaciers, mountaintops, and icy groundwater—scientists have uncovered strange ...