John Morris’ Acts & Facts article for this month is a little different from that of the last two months, in that it doesn’t resemble ‘filler’ quite so much. The piece is called simply Cavitation, and argues that the Grand Canyon could have been formed via this intriguing process.
Cavitation, as Wikipedia informs us,
…is the formation and then immediate implosion of cavities in a liquid – i.e. small liquid-free zones (“bubbles”) – that are the consequence of forces acting upon the liquid.It usually occurs when a liquid is subjected to rapid changes of pressure that cause the formation of cavities where the pressure is relatively low.