LONDON (Reuters) - Two British men of Nigerian descent accused of hacking a soldier to death on a London street in revenge for wars in Muslim countries were known to security services, a source close to the investigation said Thursday.
LONDON (Reuters) - In the lurid scene of the red-handed knifeman describing his motives for hacking to death a British soldier in broad daylight, perhaps the most chilling aspect for Londoners was the man's unmistakably familiar accent.
MILAN (Reuters) - Former Italian Prime Minister Silvio Berlusconi was involved in a tax fraud scheme while he was head of government, a Milan court said in a document released on Thursday explaining its earlier decision to uphold his four-year conviction.
Researchers have grown high-quality crystals of molybdenum disulfide, the world's thinnest semiconductor, and studied how these crystals stitch together at the atomic scale to form continuous sheets, gaining key insights into the optical and electronic properties of this new "wonder" material.
The Ring Nebula's distinctive shape makes it a popular illustration for astronomy books. But new observations by NASA's Hubble Space Telescope of the glowing gas shroud around an old, dying, sun-like star reveal a new twist.