3 ms·
Perhaps because mercury used to be used in thermometers, and the liquid now used in its place is often coloured red (and still often referred to as "mercury").
by quietbritishjim 7y ago
Perhaps because mercury used to be used in thermometers, and the liquid now used in its place is often coloured red (and still often referred to as "mercury").
- tempguy9999 7y agoProbably total coincidence. But happens when I was a kid I 'knew' thermometers contained mercury, and it was clearly red. You only had to look.