Adding fluoride to water has been common practice in a number of countries, including the US, Australia, Brazil, Malaysia, India and Vietnam. In low concentrations (below 1.5 mg/L) can help prevent tooth decay and even strengthen bones, but going above that can have the opposite effect, causing serious dental and bone disease, especially in children…
Next-Generation Optics in Just Two Minutes of Cooking Time
Optical circuits are set to revolutionize the performance of many devices. Not only are they 10-100 times faster than electronic circuits, but they also consume a lot less power. Within these circuits, light waves are controlled by extremely thin surfaces called metasurfaces that concentrate the waves and guide them as needed. The metasurfaces contain regularly…