Space Waste
Space Waste Space waste or space junk is all man-made objects in orbit about the Earth which no longer serve […]
science and technology, Simple English News Lessons
science and technology
Iran, 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