Today, the Argentinian meteorological service tweeted about a new temperature record for Antarctica of 18.3°C, made on the Espezanza peninsula. This was subsequently reported by many other sources.
The tweet contained an image of a literal analogue thermometer which did show the 18.3°C... but curiously enough, also another thermometer showing merely 10.0°C.
What's that about? Is that 10°C another means of measuring temperature, e.g. some kind of running average temperature? Or is one of the readings simply faulty?