Meanwhile, President Donald Trump has told a White House event the US is striking Iranian drone and missile systems "every single hour".

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

Israel says it is targeting sites "in the heart of Tehran", as new Iranian attacks are reported in Tel Aviv, Dubai, Doha and Bahrain's capital Manama.

Whale sharks: Atomic tests solve age puzzle of world's largest fish 鲸鲨：原子能试验解开世界上最大鱼类的年龄之谜 Episode 200427 / 27 Apr 2020 How ...