Some people just spend too much time online. Here's an expression you can use to say 'take a break'. We have an expression that you can use if you think that someone is spending just a bit too much ...

Discovered in 1570 by Diego García de Palacio, the ruins of Copán, one of the most important sites of the Mayan civilization, were not excavated until the 19th century. The ruined citadel and imposing ...

The Maya civilization flourished in South America at approximately 2000BC. They developed a unique style of arts and architecture, astronomy, even a written language. Though their writing—and even the ...

Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

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Music has held a special role in human society for thousands of years. In ancient China, for instance, sets of bronze bells were played for entertainment and ritual purposes at court. The ...

Perennial rye-grass is a tufted, vigorous grass of roadside verges, rough pastures and waste ground. It is commonly used in agriculture and for reseeding grasslands. Perennial rye-grass is a tough ...

Reed sweet-grass is a towering grass with large, loose flower heads that can be found on marshy ground near rivers, streams and ponds. It can become invasive, but does shelter various aquatic ...