An FPGA is an integrated circuit made out of a semiconductor, where the user can reconfigure the logic multiple times after manufacturing to meet their requirements. This property makes them very different from application-specific integrated circuits (ASICs) because ASICs can only do the specific task they were designed for.

Upper atmospheric lightning, also known as transient luminous events(TLEs), or ionospheric lightning is lightning and other phenomena that occur above where traditional lightning that most people know occurs. Some of these include Sprites, Elves, Jets, Trolls, Gnomes, Halos, and Pixies. They are less common than traditional thunder but occur during most thunderstorms

The Apple Vision Pro, and the Meta Quest 3 have a lot of big differences, but are still close competitors. Some of the major differences are the price, uses, and specs.

On top of Tumamoc Hill in Arizona there is a camera, but unlike traditional cameras, which take photos in less than a second, this camera will take a long exposure photo of the surrounding desert landscape of Tucson over a millennium or 1000 years. Due to its long exposure, it will show how the area has changed over time. Some parts will fade as they change, and turn into "ghosts" as the scenery changes.