Morning Overview on MSN

Sound-wave time crystal appears to defy Newton’s 3rd law in lab tests

Physicists at New York University have built a time crystal powered entirely by sound waves, and lab tests suggest the ...
Popular Science

How do sound waves work?

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Ars Technica

What is a sound wave?

Hey all! So all my life I have heard that sound is a type of wave. This seemed to make sense to me. Recently I have come across some information that has me second guessing such tradition knowledge.