Delicate features, uneven surfaces, and extreme density make it difficult to manage probe force and ensure reliability.

Russell Brand has been charged with two further offences including one count of rape, the Metropolitan Police has said. In a new statement, the police force said the Crown Prosecution Service (CPS) ...

Photonic crystals are periodic optical structures that can control the flow of light. Multiple reflections from surfaces separated by a distance similar to the wavelength prevent an optical beam from ...

Consisting of eight geographical clusters of protected areas within the boundaries of the Three Parallel Rivers National Park, in the mountainous north-west of Yunnan Province, the 1.7 million hectare ...

The daughter of Jimmy Lai, the Hong Kong pro-democracy campaigner and media tycoon, says he fears he will die a “martyr” in prison. Mr Lai, a 78-year-old British citizen who has been held in custody ...