US
Pioneer of China's lunar exploration programme Ouyang Ziyuan debates significance of Indian achievement
The step is one of many in a law passed by Iran in response to the killing of the country’s top nuclear scientist
Blames Israel for the assassination of Fakhrizadeh, seen by West as mastermind of Iran's nuclear programme
No immediate reply from Israeli officials
Relativistic jets are streams of matter emitted at speeds close to that of light
Scientists are providing a fuller understanding of essential role that sleep plays in brain health
World's oldest animal sperm, frozen 100 million years ago inside a tiny crustacean in tree resin in Myanmar
Restraining population growth, consumption per capita is way to tackle climate change, says scientist
Scientists in Singapore are hoping to perfect a new method of power generation driven largely by shadows
The nuclear physicist's petition seeks enforcement of his basic rights, including of free movement