Arsenal signing Bruno Guimaraes from Newcastle has taken recent 'Big Six' spending on players from other Premier League clubs to £1.2bn Chris Weatherspoon 218 Evann Guessand rejoins Crystal Palace on ...

Liquid crystals are substances that flow like a liquid but maintain some of the ordered structure of crystals. Liquid-crystal molecules tend to be elongated and to orient in specific directions. The ...

Exploring the biggest questions of our time with the help of the world's greatest thinkers. Host Manoush Zomorodi inspires us to learn more about the world, our communities, and most importantly, ...

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Traditionally, the red cross and red crescent have been the emblems of the International Red Cross and Red Crescent Movement. They are used to protect medical personnel, buildings and equipment in ...