On a point of order, and to help reduce the temperature of my blood from something close to 100-deg C., I keep seeing 'this phenomena' or 'a phenomena' quoted in this thread. 'Phenomena' is the plural of 'phenomenon', so it is either 'this (or a) phenomenon' (singular) or 'these phenomena' (plural).

My blood also boils at the same mis-use of the word 'media' as a singular, instead of 'medium'.

No apologies for the pedantry (but absolutely no offence intended, CS, it's just one of those itches I desperately needed to scratch!). :-)