The euro zone's temperature chart the spread of bond yields over German bunds is gradually narrowing.

ECONOMIST: Charlemagne

"Chemicals are bad, " I told my family, and proceeded to use something called the Fertility Awareness Method, which basically involves wishful thinking and a temperature chart.

CNN: What 'The Pill' did

The heatwave across Australia in recent weeks has been so intense that the Bureau of Meteorology has had to add a new shade to its colour-coded temperature chart, so the scale now reaches above 50C.

BBC: Sydney bakes on hottest day on record as bushfires rage

The fires have been caused by days of searing heat across much of the country - so much so that Australia's Bureau of Meteorology was last week forced to add a new shade to its colour-coded temperature chart, for heat above 50C.

BBC: News - Australia bushfire destroys homes and damages observatory