The result is a greater feeling of fatigue all around. The best choice of all was some sort of natural background like a forest, mountain scene, or beach. “These backgrounds not only help ...

With the natural background sounds of the bustling streets, this video provides a detailed and immersive experience of how ...

Basic approaches to radiation protection are consistent all over the world. The ICRP recommends that any exposure above the natural background radiation should be kept as low as reasonably achievable, ...

Wilson estimated that 30,000 species per year (or three species per hour) are being driven to extinction. Compare this to the natural background rate of one extinction per million species per year, ...