(Hans Strand/Corbis Documentary/Getty Images) Some truths about the Universe seem absolute. Entropy flows one way. Gravity sucks. And nothing can outrun the speed of light. But a quirk of how sound ...

Add Yahoo as a preferred source to see more of our stories on Google. Researchers say a wave's energy peak can arrive before the pulse that carries it, without breaking relativity | ©Image Credit: ...

A team of researchers at University College London has developed a way to keep objects levitated by sound waves airborne when other objects interfere with the levitation path. In their paper published ...