In 1997, the U.S. NOAA's Equatorial Pacific Ocean autonomous hydrophone array detected a "bloop" sound. The "bloop" was consistent with the sounds of an animal, but it was far too loud. It could have been aliens. Or a sea monster. Or aliens. But it's not.
The word "quantum" refers to the absolute smallest single thing that can exist. A photon, for example, is one quantum of light, since you can't get any less light than a single photon. Along with light, you can also have a quantum of sound, called a quantum phonon, and by definition, it's the quietest sound in the universe.
Raise your hand if you've ever personally witnessed the detonation of a nuclear weapon. For those of you with your hands up, please accept our admiration and respect, but for the rest of you, you have no idea what it was like. Don't feel bad, it's not your fault, but today you have a chance to see an atomic bomb test on video complete with the original soundtrack.
The sounds you hear in the Star Wars films give off the impression of being otherworldly, but most of them are recorded from regular vehicles and objects. Anyone who has seen the hundreds of hours of behind the scenes footage in the countless releases of the films will likely know how the sounds were produced. For all the non-film buffs, this new interactive book explains it all.