Space Waste
Space Waste Space waste or space junk is all man-made objects in orbit about the Earth which no longer serve a useful purpose. It includes unused satellites and other man made fragments. These objects pose…
science and technology
Iranian Scientist Designs a Way to Count People via WiFi
Simple English News Lessons: Iranian scientist designs a way to count people via WiFi دانلود فایل صوتی Professor Yasamin Mostofi is an Iranian scientist who has discovered that people can be counted via WiFi signals.…