China's Tencent becomes more valuable than Facebook

Chinese social media and video game giant Tencent became more valuable than Facebook on Tuesday as investors sent the company soaring into the top five of the world's biggest firms.

Russia denies nuclear accident after radioactive pollution

Russia on Tuesday denied its nuclear facilities experienced any incidents after reports of contamination by the ruthenium 106 radioactive isotope in parts of the country, and said the concentration detected posed little threat.

Nano-watch has steady hands

An international team from the Universities of Vienna, Duisburg-Essen and Tel Aviv have created a nanomechanical hand to show the time of an electronic clock, by spinning a tiny cylinder using light. A silicon nanorod, less ...

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