Compression – a region of high pressure, where the particles are closer together than normal. Rarefaction – a region of low pressure, where the particles are further apart than normal.

Text compression was a highly practical application of computing power. Today it might be a solved problem, but that doesn’t mean it doesn’t attract new or unusual solutions. [Fabrice Bellard ...

Instead of undergoing typical cell division, when subjected to mechanical compression, the cells grew larger and organized in tissue-like arrangements containing multiple sets of genetic material.