“The Olympic symbol consists of five interlaced rings of equal dimensions (the Olympic rings), used alone, in one or in five different colours. When used in its five-colour version, these colours ...

This means of interruption soon became inadequate and special devices called circuit breakers had to be developed. The basic problem has been to control and quench or extinguish the high power arc, ...

The colours, traditions and rituals of the holiday all have special significance. Here are six important symbols of Día de los Muertos. It is traditionally split into three tiers. The top tier ...