X-rays are a form of invisible, high-frequency electromagnetic radiation. X-rays are very small and energetic. They are used in different branches of science.
Incredible video of thousands and thousands of birds making an incredible spectacle with their sky ballet. I've seen quite a few of so called murmurations but his one takes the cake.
Using keyboard shortcuts in the most advanced commercial tool for photo manipulation can really speed up your creative process. Do you know your Photoshop for Windows shortcuts?
This is how our bellowed planet looks like on Martian twilight sky. It's the brightest point of light in the sky, and NASA's curiosity rover took a picture.