In the ETH experiment, self-oscillations (blue-red) cause sound waves (green, orange, violet) to travel through the circulator only in one direction. Credit: Xin Zou Researchers at ETH Zurich have ...

Rewinding to the days before One Direction was a global pop sensation, longtime fans might recall goofy video diaries that inspired plenty of inside jokes, silly dance moves and Liam Payne being the ...

Liam Payne gave the world so much in a short time. That’s why the pop world is reeling this week in shock and grief over the tragic news of his death on Tuesday. People loved Payne because he had so ...

In context: Sound waves typically propagate in forward and backward directions. This natural movement is problematic in some situations where unwanted reflections cause interference or reduced ...