Physicists tested sound as it travels through different materials Sound can almost reach its upper limit when traveling in solid atomic hydrogen The finding is vital in different fields of studies ...

Experimentally verified thermodynamic model reduces relative uncertainty of previous model by over one order of magnitude.

Upper limit: a US Navy F/A-18 travelling near the speed of sound in air. The white halo comprises water droplets that have condensed from the air because of the sudden drop in pressure behind the ...

Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET. When not wallowing in weird gear and iPad apps for cats, she can be found tinkering with her 1956 DeSoto. We know ...