5 Charged in Connection with Late One Direction Singer's Fatal Fall Liam Payne's Dad Geoff Pays Tribute to His Son at Hotel Where He Died as Fans Help Him Mourn The Wanted Members Recall Liam ...
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Researchers make sound waves travel in one direction only, with implications for electromagnetic wave technologyThis is useful when having a conversation, but in some technical applications one would prefer the waves to be able to travel only in one direction—for instance, in order to avoid unwanted ...
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