Israel says it is hitting "military targets" in the capitals of Iran and Lebanon. On Monday, US Secretary of State Marco Rubio said the biggest hits on Iran were "yet to come".

Three American service members have been killed and casualties are reported in the UAE, Israel and Kuwait as Israel and Iran continue to trade strikes.

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 ...

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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 ...